Total syntheses of both enantiomers of sarcophytols A and T based on stereospecific [2,3]Wittig rearrangement
摘要:
Both enantiomers of sarcophytols A (1) and T (2), cembranolide diterpenes isolated from a soft coral, were synthesized from a common chiral intermediate, obtained by baker's yeast reduction, using a stereospecific [2,3]Wittig rearrangement as the key step.
Stereochemical course of the transannular cyclization, in chloroform, of epoxycembranoids derived from the geometrical isomers of (14S)-14-hydroxy-1,3,7,11-cembratetraenes