Total synthesis of (+)-pericosine B and (+)-pericosine C and their enantiomers by using the Baylis–Hillman reaction and ring-closing metathesis as key steps
摘要:
A simple and divergent route for the total synthesis of pericosine B and pericosine C and their enantiomers from D-ribose by using the Baylis-Hillman reaction and ring-closing metathesis reactions as key steps has been described. (C) 2011 Elsevier Ltd. All rights reserved.
The stereoselective synthesis of (−)-pericosine B, which is the antipode of the cytotoxic metabolite of the fungus Periconia byssoides OUPS-N133 separated from the sea hare, was accomplished in 9 steps in 12% total yield from (−)-quinic acid, together with the synthesis of its epimer. Every crucial step of this total synthesis, including ring opening of a β-epoxide and NaBH4reduction of an unstable