An efficient asymmetric synthesis of bicyclo[3.1.0]hexane derivatives was achieved. The three-step conversion of 6-hydroxytricyclo[3.2.1.02,7]octan-3-one 2, (derived from 3-oxatricyclo[3.3.1.02,4]nonan-7-one 1 through an asymmetric deprotonation reaction) led to 6 in optically active form. Alternatively, the asymmetric deprotonation reaction of meso-cyclic ketones 9a and 9b with several chiral lithium