Gram-scale synthesis of (+)-spongistatin 1: development of an improved, scalable synthesis of the F-ring subunit, fragment union, and final elaboration.

ABSTRACT: In a quest to develop an effective, scalable synthesis of (+)-spongistatin 1 ( 1), we devised a concise, third-generation scalable synthesis of (+)- 7, the requisite F-ring tetrahydropyran aldehyde, employing a proline-catalyzed cross-aldol reaction. Subsequent elaboration to (+)-EF Wittig salt (+)- 3, followed by union with advanced ABCD aldehyde (-)- 4, macrolactonization and global deprotection permitted access to >1.0 g of totally synthetic (+)-spongistatin 1 ( 1).

SUBMITTER: Smith AB 

PROVIDER: S-EPMC2819470 | biostudies-literature | 2008 Oct

REPOSITORIES: biostudies-literature