摘要:
A homochiral bicyclic ketone having a pinguisane skeleton has: been synthesised starting from homochiral methyl 3-[(1 'S,6 'R)-1 ' ,6 ' -dimethyl-2 ' -oxo-1-yl]propionate prepared from pulegone using phenylethylamine as a chiral auxiliary. The five-membered ring was constructed by the Hosomi-Sakurai reaction of the allylsilane derived from the ketone. This synthesis can be considered a formal synthesis of deoxopinguisone. (C) 2001 Elsevier Science Ltd. All rights reserved.