Synthesis and enantioselective rearrangement of 4-amino-substituted cyclopentene oxides
作者:Peter O'Brien、Timothy D. Towers、Matthias Voith
DOI:10.1016/s0040-4039(98)01821-8
日期:1998.10
Several N-mono- and diprotected alkenes have been prepared and the, stereoselectivity of their epoxidation has been investigated: N-monoprotected alkenes give cis epoxides preferentially (due to hydrogen bonding directed epoxidations) whereas N-diprotected alkenes produce trans epoxides exclusively (due to steric effects). Chiral lithium amide base-mediated rearrangement of a cis-monoprotected epoxide generated the corresponding amino-cyclopentenol in good yield and with an enantiomeric excess of 60%. (C) 1998 Elsevier Science Ltd. All rights reserved.