Mechanism and applications of lithium amide-induced asymmetric rearrangements of 4-substituted and 4,4-disubstituted cyclopentene oxides to cyclopentenols
Mechanism and applications of lithium amide-induced asymmetric rearrangements of 4-substituted and 4,4-disubstituted cyclopentene oxides to cyclopentenols
Highly enantioselective rearrangement of quaternary carbon-containing meso-epoxides to allylic alcohols
作者:David M. Hodgson、Andrew R. Gibbs
DOI:10.1016/0957-4166(96)00019-5
日期:1996.2
The asymmetric synthesis of 4-substituted cis-4-(hydroxymethyl)cyclopent-2-en-1-ols 3 (R = alkyl, benzyloxymethyl) via highly enantioselective rearrangement of 3-substituted cis-6-oxabicyclo[3.1.0]hexane-3-methanols 1 (R = alkyl, benzyloxymethyl) is described.
Mechanism and applications of lithium amide-induced asymmetric rearrangements of 4-substituted and 4,4-disubstituted cyclopentene oxides to cyclopentenols
作者:David M. Hodgson、Andrew R. Gibbs、Michael G. B. Drew
DOI:10.1039/a907522d
日期:——
The preparation and lithium amide-induced rearrangements of 1,2-dideuterated 4-substituted cyclopentene oxides 11 and 19 are described, providing insight into the deprotonation mechanisms operating in such systems. Highly enantioselective syntheses of 4-substituted cis-4-hydroxymethylcyclopent-2-en-1-ols 32a–c are described. Also described are asymmetric syntheses of prostaglandin precursor 40 and (+)-iridomyrmecin (48) via highly enantioselective rearrangement of the epoxide 3 and subsequent Ireland–Claisen rearrangement.