An efficient synthesis of (-)-prelactone B has been developed using 1,2-cyclohexylidene glyceraldehyde as the chiral template. The key features of the synthesis were stereoselective crotylation of 1,2-cyclohexylidene glyceraldehyde and enantioselective reduction of a ketone, as well as operational simplicity and use of inexpensive reagents/chemicals.
chiral template - enantioselective synthesis - prelactone B