A Simple and Practical Synthetic Protocol for Acetalisation, Thioacetalisation and Transthioacetalisation of Carbonyl Compounds under Solvent-Free Conditions
作者:Abu T. Khan、Ejabul Mondal、Subrata Ghosh、Samimul Islam
Functionalised bicyclic alcohols by enantioselective α-deprotonation–rearrangement of meso-epoxides†
作者:David M. Hodgson、Iain D. Cameron、Martin Christlieb、Rebecca Green、Gary P. Lee、Lesley A. Robinson
DOI:10.1039/b105369h
日期:——
Enantioselective α-deprotonationârearrangement of achiral substituted cyclooctene oxides 7, 27 and 28 and N-Boc hexahydroazonine oxide 45 using organolithiums in the presence of (â)-sparteine 3 or (â)-α-isosparteine 4 gives the functionalised bicyclo[3.3.0]octan-2-ols 9, 29, and 32 and indolizinol 47 in 50â72% yields and 83â89% ees.
Dimethylboron bromide and diphenylboron bromide. Acetal and ketal cleavage. Cleavage of MEM, MOM, and MTM ethers.
作者:Yvan Quindon、Howard E. Morton、Christiane Yoakim
DOI:10.1016/s0040-4039(00)88238-6
日期:1983.1
A general and efficient procedure for the cleavage of acetals and ketals by the use of dimethylboron bromide or diphenylboron bromide is described. Under similar reaction conditions, MEM, MOM and MTM ethers also react to afford the parent alcohols in excellent yields.
Highly Efficient Transthioacetalization of O,O-Acetals Catalyzed by Indium(III) Chloride
作者:Brindaban C. Ranu、Arijit Das、Sampak Samanta
DOI:10.1055/s-2002-25347
日期:——
A simple, efficient and general procedure has been developed for the transthioacetalization of O,O-acetals catalyzed by indium(III) chloride in 1,2-dichloroethane.