A stereoselective synthesis of the C-10 to C-18 (right-half) fragment of mycalamides employing lewis acid promoted intermolecular aldol reaction.

[reaction: see text] Beginning with D-mannitol, a stereoselective synthesis of the right-half segment of the mycalamides has been accomplished by employing Lewis acid catalyzed intermolecular aldol reaction and oxypalladation as the key steps.