Sk Shamim Ahamed, Uma Sankar Mandal, Rahul Paul, Nilanjan Saha, Tapas Ghosh
{"title":"Synthetic Strategies of Heterocycle-Linked Sulfonamide Hybrids as Emerging Anticancer Agents: An Update","authors":"Sk Shamim Ahamed, Uma Sankar Mandal, Rahul Paul, Nilanjan Saha, Tapas Ghosh","doi":"10.1002/ajoc.70534","DOIUrl":"https://doi.org/10.1002/ajoc.70534","url":null,"abstract":"<div>\u0000 \u0000 <p>Sulfonamide-containing heterocycles constitute a versatile and synthetically accessible class of scaffolds in contemporary anticancer drug discovery. In recent years, substantial progress has been made in developing efficient synthetic methodologies that enable the construction and late-stage diversification of sulfonamide-based hybrid architectures. This review provides a comprehensive overview of advances reported over the past five years in the synthesis of heterocycle-integrated sulfonamide derivatives. Particular emphasis is placed on strategic bond-forming approaches, modular scaffold assembly, and late-stage sulfonylation protocols that facilitate structural diversification and rapid library generation. The discussion is organized according to the nature of the heterocyclic core, encompassing oxygen-containing systems (e.g., coumarins, flavones, naphthoquinones, and oxadiazoles), nitrogen-rich frameworks (including benzimidazoles, quinazolines, quinolines, triazines, and imidazole-pyridine hybrids), nitrogen–sulfur fused scaffolds (such as benzothiazoles, thiadiazoles, and thienopyrimidines) and chalcone-based sulfonamide hybrids, which represent an important class of molecularly hybridized anticancer scaffolds. Key synthetic strategies-ranging from classical annulation methods and nucleophilic aromatic substitution to carbodiimide-mediated coupling, Curtius rearrangement, click chemistry, and late-stage <i>N</i>-sulfonylation are critically analyzed with respect to efficiency, scope, and synthetic practicality. Collectively, these advances highlight the growing strategic importance of sulfonamide-linked heterocyclic hybrids as promising platforms for anticancer drug development.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148860220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Swarnali Ghosh, Saiful Islam, Anindita Sarkar, Tiyasa Ray, Kamalika Sen, Akhikesh Mahato, Anup Pramanik, Asish R Das
{"title":"Cascade Annulation Enabled Access to Functionalized Polyaza Tetracycles With Fused Imidazo Scaffolds for Fluorescence “Turn-Off” Sensing of Benzaldehyde Derivatives","authors":"Swarnali Ghosh, Saiful Islam, Anindita Sarkar, Tiyasa Ray, Kamalika Sen, Akhikesh Mahato, Anup Pramanik, Asish R Das","doi":"10.1002/ajoc.70530","DOIUrl":"https://doi.org/10.1002/ajoc.70530","url":null,"abstract":"<div>\u0000 \u0000 <p>Regioselective Ru(II)-catalyzed C(sp<sup>2</sup>)─H activation with concomitant (4+2) cascade annulation materializes the benzimidazo- and imidazopyridine-fused quinazolinyl ketones and quinazoline derivatives employing acyl azides and α-azido ketones as the representative coupling surrogates. The insight of this protocol is established through control experiments and DFT analyses. Again, versatility is underscored by devising chemoselective imine bond reduction and directed nitro group functionalization ortho to the carbonyl moiety. In addition, bioactive ibuprofen-appended benzimidazo-quinazolinyl methanone analogue (<b>3q</b>) and aspirin-appended tetracyclic benzimidazo-quinazoline analogue (<b>5l</b>) have also been turned up, underscoring its potential significance as a novel pharmacologically relevant framework. Interestingly, a benzimidazo-quinazoline derivative (<b>5c</b>) showcased a pronounced fluorescence “turn-off” response toward benzaldehyde and its substituted variant, with LODs of 2.03, 1.24, and 1.19 µM, respectively, exhibiting high sensitivity and selectivity.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 9","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148860219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Chemoselective Synthesis of Quinazoline and Quinazolinone Derivatives via NH4I-Mediated Oxidative Annulation Under Metal- and Additive-Free Conditions","authors":"Yongzhen Li, Yajing Liu, Jiajin Luo, Zhiwei Xi, Shuo-Wen Wang, Ji-Kai Wen, Shi Tang","doi":"10.1002/ajoc.70527","DOIUrl":"https://doi.org/10.1002/ajoc.70527","url":null,"abstract":"<div>\u0000 \u0000 <p>Owing to the structural importance and synthetic value of quinazoline and quinazolinone scaffolds in drug discovery, we herein report a novel NH<sub>4</sub>I‑involved oxidative annulation of readily available 2,1‑benzisoxazoles/isatoic anhydrides with benzylic alcohols for the selective synthesis of these heterocycles. In this three‑component transformation, ammonium iodide serves as both an economical nitrogen source and a co‑oxidant, avoiding the use of additional additives. This metal‑ and additive‑free protocol enables precise cleavage of C─O/N─O bonds with simultaneous formation of C─N bonds in a single operation, exhibiting excellent chemoselectivity, atom economy, and broad functional group tolerance. Additionally, the resulting quinazoline and quinazolinone derivatives are efficiently transformed into high‑value analogues of bioactive molecules, underscoring the synthetic utility of the method.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of Tetrasubstituted 2-Pyrrolines via Zn(II)-Catalyzed [3+2] Annulation of NH2-Enaminones and N-Tosylaziridines","authors":"Qingna Yang, Yan Xie, Liang Xie, Xinying Li, Ziyan Wu, Yucai Jiang, Huiyan Lou, Lulu Chen, Changyuan Zhang","doi":"10.1002/ajoc.70520","DOIUrl":"https://doi.org/10.1002/ajoc.70520","url":null,"abstract":"<div>\u0000 \u0000 <p>A Zn(II)-catalyzed [3+2] annulation of NH<sub>2</sub>-enaminones with N-tosylaziridines is described. Various NH<sub>2</sub>-enaminones, along with diversely substituted N-tosylaziridines, underwent this transformation to deliver tetrasubstituted 2-pyrrolines in 44%–98% yields under mild conditions. This protocol offers broad substrate scope, good functional group tolerance, and high regioselectivity. Additionally, the resulting tetrasubstituted 2-pyrrolines could be oxidized to pyrrole (under air/TFA) or undergo tosyl migration (under KOH), highlighting their synthetic versatility.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrocatalytic Synthesis of Dithiosulfonates From Tetrasulfides and Sodium Arylsulfinates","authors":"Xiaoxiao Li, Yingming Song, Yue Yu, Wei Wang","doi":"10.1002/ajoc.70521","DOIUrl":"https://doi.org/10.1002/ajoc.70521","url":null,"abstract":"<div>\u0000 \u0000 <p>Sustainable unsymmetrical disulfide synthesis is of significant interest due to the crucial role of disulfide bonds in protein stabilization, peptide drug design, and medicinal chemistry, as exemplified by Disulfiram and ADT-OH. Additionally, sulfone-containing compounds such as Eletriptan and Dapsone exhibit important pharmaceutical activities. Combining these two motifs, dithiosulfonates (compounds containing a S–S–S(O)<sub>2</sub> linkage) represent a class of compounds with high research potential. Traditional methods for unsymmetrical disulfide synthesis suffer from malodorous thiols, overoxidation, toxicity, and reliance on precious metals. Although pre-activation strategies using RSSTs reagents have enabled efficient cross-coupling, the preparation of RSSTs themselves remains challenging, with conventional routes suffering from low atom economy and toxicity, while photocatalytic approaches require expensive iridium catalysts. Herein, we report a mild, transition-metal-free electrochemical approach for the synthesis of dithiosulfonates from tetrasulfides and sodium arylsulfinates. This method avoids malodorous thiols, toxic reagents, and precious metal catalysts, providing a greener and more sustainable route to structurally diverse dithiosulfonates.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Photo-Induced Radical 1,2-Aminosulfonylation of Alkene to Synthesize β-Amino Sulfonamides","authors":"Shuai-Xiao Lu, Yan-Bing Wei, Wen-Chao Yang, Yong Zhang","doi":"10.1002/ajoc.70518","DOIUrl":"https://doi.org/10.1002/ajoc.70518","url":null,"abstract":"<div>\u0000 \u0000 <p>Herein, we demonstrate the use of N─N bond cleavage and imine distal migration in photoinduced 1,2-aminosulfonylation of alkene to synthesize β-amino sulfonamides. The protocol features room temperature conditions, photocatalyst-free, transition metal-free synthesis, high yields, and simple operation.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jean C. Kazmierczak, Kelvin V. Hübner, Eduarda R. Fritz, Paola S. Hellwig, Claudio C. Silveira, Ricardo F. Schumacher
{"title":"Synthesis of 3-Chalcogenyl-benzo[b]Chalcogenophenes via Chalcogenation/Cyclization of Alkynes Promoted by Selectfluor","authors":"Jean C. Kazmierczak, Kelvin V. Hübner, Eduarda R. Fritz, Paola S. Hellwig, Claudio C. Silveira, Ricardo F. Schumacher","doi":"10.1002/ajoc.70516","DOIUrl":"https://doi.org/10.1002/ajoc.70516","url":null,"abstract":"<p>A straightforward and efficient strategy for the synthesis of 3-selanyl-benzo[<i>b</i>]thiophenes is reported via the electrophilic cyclization of 2-alkynylthioanisoles. This operationally simple reaction is conducted using Selecfluor as a mild, stable, and easy-to-handle oxidizing agent. The methodology is compatible with various functional groups, affording a range of benzo[<i>b</i>]thiophenes through the formation of new C─S and C─Se bonds in a single step, with moderate to good yields. Furthermore, the tolerance to disulfides and ditellurides demonstrates the flexibility of this new methodology in incorporating multifunctionalities into the synthesized benzochalcogenophenes.</p>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ajoc.70516","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Steroids With Insecticidal Activity Against the Larvae of Diaphorina citri Kuwayama From Tinospora sagittata","authors":"Fei Liu, Li-Ming Zhan, Yang Han, Kai-Cheng Yang, Jia-Qi Song, Ting Liu, Li-Jun Zhang, Hai-Bing Liao","doi":"10.1002/ajoc.70517","DOIUrl":"https://doi.org/10.1002/ajoc.70517","url":null,"abstract":"<div>\u0000 \u0000 <p>Twelve steroids (<b>1</b>−<b>12</b>) including one undescribed and a new natural product were isolated from the roots of <i>Tinospora sagittata</i>. The chemical structures of those compounds were elucidated by spectroscopic methods, electronic circular dichroism (ECD) or single-crystal x-ray diffraction analysis. Notably, compounds <b>2</b> and <b>3</b> are a pair of C-5 epimers. Except for compounds <b>3</b> and <b>4</b>, the remaining compounds were isolated from <i>Tinospora sagittata</i> (<i>T. sagittata</i>) for the first time. Biologically, at a concentration of 1 and 10 mg/L, two compounds showed insecticide activity. Especially, at a concentration of 10 mg/L, compounds <b>6</b> and <b>12</b> showed the potent activities, with corrected mortality rates of 68.42% and 71.07%, comparable to that of the positive control spirotetramat (71.07%). Research on the potential insecticidal mechanism of compound <b>12</b> revealed that six target proteins were predicted via network pharmacology and molecular docking analyses, with EGFR subsequently identified as the most probable target through western blot verification.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"N-Phenacylpyridinium Salts-Involved Formal Cyclization Reactions to Access Spiro[cyclopropane-1,3'-indolines]","authors":"Jinyan Liang, Yanjing Zheng, Kejing Shi, Donghui Guo, Shoujie Shen","doi":"10.1002/ajoc.70512","DOIUrl":"https://doi.org/10.1002/ajoc.70512","url":null,"abstract":"<div>\u0000 \u0000 <p>A novel formal (2 + 1) cyclization reaction between iminoindoline-derived alkenes and N‑phenacylpyridinium salts has been developed to enable the efficient assembly of spiro[cyclopropane-1,3'-indolines] with excellent yields. A related one-pot formal (1 + 1 + 1) cyclization reaction among iminoindolines, aldehydes, and N‑phenacylpyridinium salts has also been designed to construct the same spiroskeletons efficiently. The mild reaction conditions, the broad scope of substrates, and the promising scale-up potential embody the synthetic superiority of these two processes.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"N-Heterocycle Promoted the Synthesis of Tertiary Amides","authors":"Xinyu Zhang, Rui Sun, Haoran Liang, Yuzhen Zhang, Dongni Lin, Xiao Yang","doi":"10.1002/ajoc.70515","DOIUrl":"https://doi.org/10.1002/ajoc.70515","url":null,"abstract":"<div>\u0000 \u0000 <p>A novel approach for the construction of tertiary amides via hydroamination of secondary amides with acrylates promoted by <i>N</i>-heterocycles (NHs) is described. The developed system enables a range of <i>N</i>-alkyl-2,6-difluorobenzamides to deliver <i>N</i>, <i>N</i>-dialkyl tertiary amides, which serves as a complementary alternative to existing synthetic protocols. Mechanistic studies confirm the pivotal function of NHs in this reaction system.</p>\u0000 </div>","PeriodicalId":130,"journal":{"name":"Asian Journal of Organic Chemistry","volume":"15 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}