A short stereoselective synthesis of (+)-(6R,2'S)-cryptocaryalactone via ring-closing metathesis

Stereoselective total synthesis of (-)-(6S,2'R)-cryptocaryalactone

We described a novel stereoselective total synthesis of (-)-(6S,2'R)-cryptocaryalactone, a natural product containing syn/anti-6,8-diol/5,6-dihydro-2H-pyran-2-one unit. The approach, which characterised a highly diastereoselective chelation-controlled Mukaiyama aldol reaction of a benzyl-protected aldehyde and a Yamaguchi lactonisation of a δ-hydroxy-trans-α,β-unsaturated carboxylic acid, is an alternative synthetic strategy towards cryptocaryalactones.

Stereoselective total synthesis of ent-hyptenolide

A stereoselective total synthesis of ent-hyptenolide is reported.