Arylbis(arylthio)sulfonium salts as reagents for the synthesis of 2-deoxy-.beta.-glycosides
作者:Gurmit Grewal、Neelu Kaila、Richard W. Franck
DOI:10.1021/jo00033a033
日期:1992.3
The title sulfonium salts undergo electrophilic addition to glycals in the presence of alcohols to form principally beta-glycosides. A substituent effect study has shown that the reagent with a p-tolylthio group is the most face-selective. By variation of the alcohol nucleophile, it has been shown that face selectivity is also dependent on the structure of the nucleophile. One instance of double diastereodifferentiation was uncovered when the racemic alcohol 23.5 was used in a reaction with tribenzyl glucal 22.1. The effect of glycal substitution on the face selectivity has led to the postulation of a heretofore unrecognized and still unexplained stereoelectronic effect.
MISHCHENKO, V. F.;BUGORSKAYA, O. V.;TROSHINA, O. I., VOPR. XIMII I XIM. TEXNOL., XARKOV, 1984, N 76, 64-67
作者:MISHCHENKO, V. F.、BUGORSKAYA, O. V.、TROSHINA, O. I.
DOI:——
日期:——
Studies on the catalysis of the reaction of organotin phenoxides with diethyl azodicarboxylate by lithium perchlorate
作者:Wojciech J Kinart、Cezary M Kinart
DOI:10.1016/s0022-328x(02)02129-0
日期:2003.1
Organotin phenoxides react at room temperature with diethylazodicarboxylate in diethyl ether, in the presence of lithium perchlorate, give the corresponding ring-aminated phenols in excellent yield.
Mutualism in organic synthetic chemistry: Simultaneous heterodehydrocoupling of hydrostannane and reduction of quinoline
作者:Tianwei Liu、Jianghua He、Yuetao Zhang
DOI:10.1016/s1872-2067(23)64590-5
日期:2024.3
and reduction of quinoline by using B(CF) as catalyst under mild conditions. This method realizes the synthesis of heteroatom-tin complexes by the same catalyst system. With the assistance of quinoline, the substrate scope was broadened and yield was significantly enhanced. During the reaction, the generated heterodehydrocoupling intermediate [H][HB(CF)] would accelerate the quinoline reduction by transforming