(11R, 12S)-lactobacillic acid (1) has been prepared either from D-mannitol
by asymmetric cyclopropanation or from cycyclopropane-1, 2-dimethanol by en
zymatic desymmetrisation. The syntheses of (11S, 12R)-lactobacillic acid (2
) and (1R, 2S) 1(3'-methoxycarbonylpropyl)-2-octadecylcopropane (26) and re
lated analogues (27 and 28) have also been achieved. (C) 1999 Elsevier Scie
nce Ltd. All rights reserved.