Reaction of 2-acylaminomethyl-1,1-dibromocyclopropanes with methyllithium a
t -90 degreesC leads to selective bromine-lithium exchange and cyclisation
to give a 1-bromo-3-azabicyclo[3.1.0]hexan-2-ol. (C) 2001 Elsevier Science
Ltd. All rights reserved.