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A convenient synthesis of novel nucleosides of 2-thioxo-5h-3,4-dihydropyrimido[5,4-b]indol-4-one 2-硫氧-5h-3,4-二氢嘧啶[5,4-b]吲哚-4-酮核苷的简便合成
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110215845
M. Saleh
{"title":"A convenient synthesis of novel nucleosides of 2-thioxo-5h-3,4-dihydropyrimido[5,4-b]indol-4-one","authors":"M. Saleh","doi":"10.1080/02786110215845","DOIUrl":"https://doi.org/10.1080/02786110215845","url":null,"abstract":"Reaction of 3-amino-2-ethoxycarbonylindole ( 1 ) with per- O -acetyl-sugar isothiocyanates 2a-c gave the corresponding glycopyranosyl thioureas 3a-c . The N -nucleosides analogues 3-(per- O -acetyl- β -D-glycopyranosyl)-2-thioxo-5H-3, 4-dihydropyrimido [5,4-b] indol- 4 -one 4a-c were obtained by cyclization of 3a-c in the presence of ZnCl2. Deacetylation of 4a-c with sodium methoxide in methanol yielded the free nucleoside derivatives 5a-c . Alkylation of 5a,b with methyl iodide and benzyl bromide gave good yields of the corresponding 2-methylthio 6a,b and the 2-benzylthio 6c,d analogues. The 2-methylsulfonyl compounds 7a,b were obtained from the corresponding 2-methylthio compounds 6a,b by oxidation with m -chloroperoxybenzoic acid.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"149 1","pages":"235 - 245"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86131181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Synthesis of Imidazo[1,2- a ] Pyridine Gem -Amido Vinyl Sulfides, Vinyl Sulfoxides And Vinyl Sulfones. Influence of the Degree of Oxidation of the Sulfur on the Stereoselectivity of the Reaction 咪唑[1,2- a]吡啶-氨基乙烯基硫化物、乙烯基亚砜和乙烯基砜的合成硫的氧化程度对反应立体选择性的影响
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110210633
S. Céard, M. Vivier, D. Roche, M. Madesclaire
{"title":"Synthesis of Imidazo[1,2- a ] Pyridine Gem -Amido Vinyl Sulfides, Vinyl Sulfoxides And Vinyl Sulfones. Influence of the Degree of Oxidation of the Sulfur on the Stereoselectivity of the Reaction","authors":"S. Céard, M. Vivier, D. Roche, M. Madesclaire","doi":"10.1080/02786110210633","DOIUrl":"https://doi.org/10.1080/02786110210633","url":null,"abstract":"( E )-Stereoisomers of imidazo[1,2- a ]pyridine gem -amido vinyl sulfoxides and vinyl sulfones are efficiently prepared by condensation of N , N -diethylphenylsulfinyl or z N , N -diethylphenyl- sulfonylacetamide with imidazo[1,2- a ]pyridine-2-carbaldehyde in the presence of NEt 3 .","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"3 1","pages":"15 - 20"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91313074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
In pursuit of the elusive trithia[1.1.1]propellane: Synthesis of potential 1,3-dithietane precursors 寻找难以捉摸的三硫醚[1.1.1]推进剂:潜在的1,3-二己烷前体的合成
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110212860
U. Zoller, Fayun Chen
{"title":"In pursuit of the elusive trithia[1.1.1]propellane: Synthesis of potential 1,3-dithietane precursors","authors":"U. Zoller, Fayun Chen","doi":"10.1080/02786110212860","DOIUrl":"https://doi.org/10.1080/02786110212860","url":null,"abstract":"High-level ab initio calculations predicted the strained three-membered trithia[1.1.1]propellane 1a (X=Y=Z=S) to be a tightly-bound molecule which should be experimentally accessible. In analogy to the successful synthesis of'the [1.1.1] propellane, our synthesis strategy focused on the attempted preparation of 1,3-dihalo-trithia-bicyclo[1.1.1] pentanes 2 , to serve as a precursor for the target molecule. However, 1a proved to be unattainable via the planned strategy beyond the stage of the readily synthesized, substituted 1,3-dithietanes 3 , due to the inaccessibility of 2 from the latter. The successfully synthesized 1,3-dithietanes 5c,d are expected to provide 2 , the key precursor of 1 via 1,3-dihalogenation-dehalogenation.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"25 1","pages":"115 - 121"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82177468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Sulfur-rich copolymers of sulfur with 5-vinylbicyclo[2.2.1]hept-2-ene and tricyclo[5.2.1.0 2.6]deca-3,8-diene as prospective cathode materials for lithium cells 硫与5-乙烯基双环[2.2.1]庚-2-烯和三环[5.2.1.0 2.6]癸-3,8-二烯的富硫共聚物作为锂电池正极材料的前景
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110214494
B. Trofimov, L. Parshina, N. Gusarova, N. Ivanova, G. Myachina, I. Kovalev, T. Skotheim
{"title":"Sulfur-rich copolymers of sulfur with 5-vinylbicyclo[2.2.1]hept-2-ene and tricyclo[5.2.1.0 2.6]deca-3,8-diene as prospective cathode materials for lithium cells","authors":"B. Trofimov, L. Parshina, N. Gusarova, N. Ivanova, G. Myachina, I. Kovalev, T. Skotheim","doi":"10.1080/02786110214494","DOIUrl":"https://doi.org/10.1080/02786110214494","url":null,"abstract":"Catalytic copolymerization of sulfur with 5-vinylbicyclo[2.2.1]hept-2-ene or tricyclo[5.2.1.0 2.6 ]deca-3,8-diene (sulfur:diene ratio=20:1) at 170 v °C in bulk or decalin in the presence of 1,4-diazabicyclo[2.2.2]octane or N,N,N,N-tetramethylethylenediamine in combination with CoCl 2 - 6H 2 O or Cu(acac) 2 occurs at two dienic double bonds to form partially cross-linked copolymers stable up to 200 v °C (DSC/TGA). Preliminary evaluation of the specific discharge capacity of cathodes made using the above copolymers in model lithium button cells gives 670-970 and 300-330 v mA - h - g m 1 in the 1st and 50th cycles, respectively.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"32 1","pages":"219 - 227"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84033630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Crystal Structure of (1 R ,2 S ,5 R )-Menthyl ( S )-2-Methoxy-Naphthalene-1-Sulfinate (1 R,2 S,5 R)-甲基(S)-2-甲氧基萘-1-亚磺酸盐的晶体结构
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110211431
K. Prabakaran, S. Pyne, B. Skelton, Allan H. White
{"title":"Crystal Structure of (1 R ,2 S ,5 R )-Menthyl ( S )-2-Methoxy-Naphthalene-1-Sulfinate","authors":"K. Prabakaran, S. Pyne, B. Skelton, Allan H. White","doi":"10.1080/02786110211431","DOIUrl":"https://doi.org/10.1080/02786110211431","url":null,"abstract":"The crystal structure of (1 R ,2 S ,5 R )-menthyl ( S )-2-methoxy-1-naphthalene sulfinate (C 21 H 27 O 3 S) is reported, thus confirming the absolute stereochemistry of this synthetically important molecule.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"19 1","pages":"67 - 69"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84260029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis and X-ray structure determination of thionated biphthalimides 硫代联苯酰亚胺的合成及x射线结构测定
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110215844
M. Coogan, J. Platts, R. Haigh
{"title":"Synthesis and X-ray structure determination of thionated biphthalimides","authors":"M. Coogan, J. Platts, R. Haigh","doi":"10.1080/02786110215844","DOIUrl":"https://doi.org/10.1080/02786110215844","url":null,"abstract":"Thiation of N , N -biphthalimide in a search for new axially chiral ligands gave a mixture of oligothiobiphthalimides; X-ray crystallography shows that the achiral isomer of dithiodioxobiphthalimide, 1,3-dithioxo-1H-3H-[2,2 ' ]biisoindolyl-1 ' ,3 ' -dione is formed, which may imply a change in the mechanism of thiation between mono- and di-phthalimides.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"37 1","pages":"251 - 257"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81501805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Deprotection of tuioacetals by wet alumina supported cr(VI) oxide under solvent-free conditions 湿氧化铝负载cr(VI)氧化物在无溶剂条件下对缩醛的脱保护
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110213975
A. Hajipour, A. Ruoho
{"title":"Deprotection of tuioacetals by wet alumina supported cr(VI) oxide under solvent-free conditions","authors":"A. Hajipour, A. Ruoho","doi":"10.1080/02786110213975","DOIUrl":"https://doi.org/10.1080/02786110213975","url":null,"abstract":"Wet alumina supported chromium( VI) oxide performed efficient deprotection of S,S-acetals ( 1 ), 1,3-dithiolanes and 1,3-dithianes ( 2 ) under solvent-free conditions at room temperature. The reaction has been carried out in excellent yield and short reaction time under solvent-free conditions and the purification of products was straightforward.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"11 1","pages":"151 - 154"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75897018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
An unusual rearrangement of the thujane skeleton under free-radical conditions: Synthesis of thioacetates and thiols derivatives of (-)-sabinene 一种不寻常的重排骨架在自由基条件下:合成硫乙酸盐和(-)-沙宾烯的硫醇衍生物
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110213974
Karine Candela, R. Fellous, D. Joulain, R. Faure
{"title":"An unusual rearrangement of the thujane skeleton under free-radical conditions: Synthesis of thioacetates and thiols derivatives of (-)-sabinene","authors":"Karine Candela, R. Fellous, D. Joulain, R. Faure","doi":"10.1080/02786110213974","DOIUrl":"https://doi.org/10.1080/02786110213974","url":null,"abstract":"Photochemical acetylthiolation of (-)-sabinene 1 afforded 10-acetylthiothujane 2 and an unexpected cyclopentenyl methyl thioacetate 3 in moderate yield (24%). Hydride reduction of these two latter compounds gave two monoterpenoid thiols ( 2a and 3a ) in excellent yield (95%). The odour of the major sulfur-containing compounds 2 and 2a was respectively described as being typically anisic and as reminiscent of cooked leek. Structural determination of these derivatives was achieved by one- and two-dimensional NMR spectroscopy.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"168 1","pages":"145 - 149"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90135922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Nitroketene dithioacetal chemistry: Synthesis and characterization of some 1,1-di(alkylsulfanyl)-2-nitroethylenes and 2-(nitromethylene)-1,3-dithia heterocycles 亚硝基二硫缩醛化学:一些1,1-二(烷基磺酰)-2-亚硝基乙烯和2-(亚硝基甲基)-1,3-二硫杂环的合成和表征
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110214497
Suryanarayana Rao, L. Sakthikumar, S. Shreedevi
{"title":"Nitroketene dithioacetal chemistry: Synthesis and characterization of some 1,1-di(alkylsulfanyl)-2-nitroethylenes and 2-(nitromethylene)-1,3-dithia heterocycles","authors":"Suryanarayana Rao, L. Sakthikumar, S. Shreedevi","doi":"10.1080/02786110214497","DOIUrl":"https://doi.org/10.1080/02786110214497","url":null,"abstract":"Differently substituted 1,1-di(alkylsulfanyl)-2-nitroethylene and 2-(nitroethylene)-1,3-dithia heterocycles were synthesized and characterized on the basis of spectral data. The X-ray crystal analysis of 2-(nitromethylene)-1,3-dithietane reveals a dimeric structure, stabilized through CH-O hydrogen bonding interactions. Attempted synthesis of dithia-crown ethers from the salt did not furnish the desired products instead only 2-(nitromethylene)-1,3-dithiolane was formed in the reaction.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"14 1","pages":"207 - 218"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82037673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Synthesis of aliphatic thiomorpholides by willgerodt-kindler reaction under solvent-free conditions 无溶剂条件下willgerodt-kindler反应合成脂肪族硫胚
Sulfur Letters Pub Date : 2002-01-01 DOI: 10.1080/02786110215846
K. Aghapoor, H. R. Darabi, K. Tabar-Heydar, L. Nakhshab
{"title":"Synthesis of aliphatic thiomorpholides by willgerodt-kindler reaction under solvent-free conditions","authors":"K. Aghapoor, H. R. Darabi, K. Tabar-Heydar, L. Nakhshab","doi":"10.1080/02786110215846","DOIUrl":"https://doi.org/10.1080/02786110215846","url":null,"abstract":"The Willgerodt-Kindler reaction of aliphatic ketones and aldehydes with sulfur and morpholine under solvent-free conditions was performed in a domestic microwave oven. The method is simple, rapid and avoids prolonged heating with solvents.","PeriodicalId":22122,"journal":{"name":"Sulfur Letters","volume":"20 1","pages":"259 - 261"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75371427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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