An improved preparation of epoxides from carbonyl compounds by using diiodomethane/methyllithium: synthetic applications
摘要:
Synthesis of epoxides starting from different carbonyl compounds is easily carried out by using a diiodomethane and methyl-lithium at 0 degreesC and a short reaction time. Starting from alpha -aminoaldehydes the reaction affords amino epoxides, with high diastereoselectivity. The products were transformed into 1,3-diaminoalkan-2-ols by treatment with different amines. (C) 2001 Elsevier Science Ltd. All rights reserved.
Protective group tuning in the stereoselective conversion of α-amino aldehydes into aminoalkyl epoxides
作者:M.T. Reetz、J. Binder
DOI:10.1016/s0040-4039(01)80584-0
日期:1989.1
Sulfonium and arsonium ylides of the type CH2=S(CH3)2 and CH2=As(Ph)3 react with doubly protected α-amino aldehydes derived from amino acids to form aminoalkyl epoxides /, diastereofacial selectivity ranging between 86:14 and 95:5.
Ring Opening of Nonactivated 2-(1-Aminoalkyl) Aziridines: Unusual Regio- and Stereoselective C-2 and C-3 Cleavage
作者:José M. Concellón、Estela Riego
DOI:10.1021/jo034440v
日期:2003.8.1
We have studied the ring opening of nonactivated amino aziridines 1 by water under acidic conditions. Depending on the acid used, amino aziridines are cleaved at C-3 or C-2 with high regioselectivity, and total stereoselectivity, affording chiral 2,3-diaminoalkan-1-ols 3 or 1,3-diaminoalkan-2-ols 4 in high yield.