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Epimerisation-free peptide formation from carboxylic acid anhydrides and azido derivatives 由羧酸酸酐和叠氮衍生物形成的无外聚肽
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000091
I. Bosch, F. Urpí, J. Vilarrasa
{"title":"Epimerisation-free peptide formation from carboxylic acid anhydrides and azido derivatives","authors":"I. Bosch, F. Urpí, J. Vilarrasa","doi":"10.1039/C39950000091","DOIUrl":"https://doi.org/10.1039/C39950000091","url":null,"abstract":"Conversion of C-terminal carboxy groups of N-protected α-amino acids to the corresponding 3,5-dinitrobenzoyl mixed anhydrides, followed by treatment with α-azido esters and trialkylphosphines, affords good yields of peptides, without appreciable formation of epimers even for reactions involving Phe–Val and Val–Val couplings and/or N-benzoyl α-amino acids.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"474 1","pages":"91-92"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78346438","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: 16
Geometric control of manganese redox state 锰氧化还原态的几何控制
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001035
M. Drew, C. Harding, V. McKee, G. G. Morgan, J. Nelson
{"title":"Geometric control of manganese redox state","authors":"M. Drew, C. Harding, V. McKee, G. G. Morgan, J. Nelson","doi":"10.1039/C39950001035","DOIUrl":"https://doi.org/10.1039/C39950001035","url":null,"abstract":"Comparison of the structures of four monomanganese (and one monoiron) complexes of ligands with the identical donor [N3(O–)3] set reveals that geometry determines the redox state of the cation.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"251 1","pages":"1035-1038"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78371904","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: 112
Condensation route from 1,1,1-tris(diethylboryl)propane to pentaethyl-1,5-dicarba-closo-pentaborane(5)via arachno-CB4(10) and nido-C2B4(8) carbaboranes 1,1,1-三(二乙基)丙烷经arachno-CB4(10)和nido-C2B4(8)碳硼烷缩合成戊乙基-1,5-二碳-近戊硼烷(5)的缩合路线
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001691
R. Köster, R. Boese, B. Wrackmeyer, H. Schanz
{"title":"Condensation route from 1,1,1-tris(diethylboryl)propane to pentaethyl-1,5-dicarba-closo-pentaborane(5)via arachno-CB4(10) and nido-C2B4(8) carbaboranes","authors":"R. Köster, R. Boese, B. Wrackmeyer, H. Schanz","doi":"10.1039/C39950001691","DOIUrl":"https://doi.org/10.1039/C39950001691","url":null,"abstract":"Diethyl(prop-1-ynyl)borane 1 reacts, in the presence of a large excess of tetraethyldiborane(6), to give the new substituted 1-carba-arachno-pentaborane(10)4 as the first intermediate which can be isolated; 4 rearranges via the nido-C2B4(8) carbaboranes A and Bto the known pentaethyl-1,5-dicarba-closo-pentaborane(5)5which is characterized by single crystal X-ray analysis.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"137 1","pages":"1691-1692"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78511698","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: 14
Hydroperoxides as pseudohalides: oxidation, oxidative alkylation, acylation and arylation of acrylonitrile 作为假卤化物的氢过氧化物:丙烯腈的氧化、氧化烷基化、酰化和芳化
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001399
S. Araneo, F. Fontana, F. Minisci, F. Recupero, A. Serri
{"title":"Hydroperoxides as pseudohalides: oxidation, oxidative alkylation, acylation and arylation of acrylonitrile","authors":"S. Araneo, F. Fontana, F. Minisci, F. Recupero, A. Serri","doi":"10.1039/C39950001399","DOIUrl":"https://doi.org/10.1039/C39950001399","url":null,"abstract":"New general syntheses, based on free-radical oxidative alkylation, acylation and arylation of acrylonitrile, in the presence of ButO2H, are reported; the concept of the peroxy group as a pseudohalide is suggested to explain these new reactions.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"36 1","pages":"1399-1400"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77429083","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
Improved tumour targeting with recombinant antibody–macrocycle conjugates 重组抗体-大环偶联物改善肿瘤靶向性
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001877
T. J. Norman, D. Parker, L. Royle, A. Harrison, Pari Antoniwb, David J. Kingb
{"title":"Improved tumour targeting with recombinant antibody–macrocycle conjugates","authors":"T. J. Norman, D. Parker, L. Royle, A. Harrison, Pari Antoniwb, David J. Kingb","doi":"10.1039/C39950001877","DOIUrl":"https://doi.org/10.1039/C39950001877","url":null,"abstract":"Linkage of a macrocyclic complexing agent to a spaced tri-maleimide allows formation of a recombinant trivalent antibody by reaction with a Δ-Cys Fab fragment of an engineered human antibody.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"108 1","pages":"1877-1878"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72860046","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: 12
Axial and helical chirality of some spiro-1,3-dioxanes 一些螺-1,3-二恶烷的轴向和螺旋手性
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000167
I. Grosu, S. Mager, G. Plé, Mihai Horn
{"title":"Axial and helical chirality of some spiro-1,3-dioxanes","authors":"I. Grosu, S. Mager, G. Plé, Mihai Horn","doi":"10.1039/C39950000167","DOIUrl":"https://doi.org/10.1039/C39950000167","url":null,"abstract":"The diastereoisomerism of some spiro 1,3-dioxanes with axial chirality and of some trispiro derivatives exhibiting an axial and a hitherto unreported helical chirality for spiranic compounds is discussed.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"34 1","pages":"167-168"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72917864","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: 22
Reaction of C60 with cyclopent-2-enone acetals. A convenient access to chiral C60 derivatives C60与环戊烯酮缩醛的反应。方便获取手性C60衍生物
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001769
M. Ohkita, Koh Ishigami, T. Tsuji
{"title":"Reaction of C60 with cyclopent-2-enone acetals. A convenient access to chiral C60 derivatives","authors":"M. Ohkita, Koh Ishigami, T. Tsuji","doi":"10.1039/C39950001769","DOIUrl":"https://doi.org/10.1039/C39950001769","url":null,"abstract":"C60 reacts with cyclopent-2-enone ethylene acetal to give C60-fused norbornan-2-one acetal; modification of the starting acetal with a chiral auxiliary leads to a mixture of diastereoisomeric adducts from which a pair of enantiomerically pure C60-fused norbornan-2-ones are readily obtained.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"7 1","pages":"1769-1770"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73128193","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
Lithium anilide complexed by pmdeta: expectation of a simple monomer, but in reality an odd trinuclear composition combining three-, four- and five-coordinate lithium 苯胺锂与聚苯胺配合:期望是一个简单的单体，但实际上是一个奇怪的三核组合物，由三、四和五坐标锂组成
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950000891
D. Barr, W. Clegg, Lucy Cowton, Lynne Horsburgh, Fiona M. Mackenzie, R. Mulvey
{"title":"Lithium anilide complexed by pmdeta: expectation of a simple monomer, but in reality an odd trinuclear composition combining three-, four- and five-coordinate lithium","authors":"D. Barr, W. Clegg, Lucy Cowton, Lynne Horsburgh, Fiona M. Mackenzie, R. Mulvey","doi":"10.1039/C39950000891","DOIUrl":"https://doi.org/10.1039/C39950000891","url":null,"abstract":"Lithium structural chemistry continues to surprise as highlighted here by the reaction of BunLi, aniline and pmdeta, which by analogy with related systems, should yield a simple monomeric complex, when, in fact, an unprecedented trinuclear formulation is produced; in contrast, the corresponding Na system falls into line with predictions, in yielding a dimeric product.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"77 1","pages":"891-892"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73417055","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: 15
New strategy for the synthesis of the taxane diterpenes: formation of the eight-membered B-ring of taxol by semi-pinacol rearrangement 合成紫杉醇二萜的新策略:半蒎烯重排形成紫杉醇八元b环
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001935
P. Magnus, L. Diorazio, T. Donohoe, M. Giles, P. Pye, James G. Tarrant, S. Thom
{"title":"New strategy for the synthesis of the taxane diterpenes: formation of the eight-membered B-ring of taxol by semi-pinacol rearrangement","authors":"P. Magnus, L. Diorazio, T. Donohoe, M. Giles, P. Pye, James G. Tarrant, S. Thom","doi":"10.1039/C39950001935","DOIUrl":"https://doi.org/10.1039/C39950001935","url":null,"abstract":"Solvolysis of the neopentyl triflates 14, 25 and 32 resulted in ring expansion of a seven-membered ring into the eight-membered ring required for the synthesis of the taxanes diterpenoids.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"92 1","pages":"1935-1936"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73417331","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: 4
SYN AND ANTI CYCLOADDITION OF SINGLET OXYGEN TO BISDIALINE 双双苯胺单线态氧的顺、反环加成
Journal of The Chemical Society, Chemical Communications Pub Date : 1995-01-01 DOI: 10.1039/C39950001887
G. Delogu, D. Fabbri, F. Fabris, F. Sbrogiò, G. Valle, O. Lucchi
{"title":"SYN AND ANTI CYCLOADDITION OF SINGLET OXYGEN TO BISDIALINE","authors":"G. Delogu, D. Fabbri, F. Fabris, F. Sbrogiò, G. Valle, O. Lucchi","doi":"10.1039/C39950001887","DOIUrl":"https://doi.org/10.1039/C39950001887","url":null,"abstract":"Singlet oxygen undergoes cycloaddition to bisdialine 1 to afford predominantly the anti adduct 2, while the expected syn product 3 is formed only in low yield.","PeriodicalId":17282,"journal":{"name":"Journal of The Chemical Society, Chemical Communications","volume":"156 1","pages":"1887-1888"},"PeriodicalIF":0.0,"publicationDate":"1995-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79900835","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: 7
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