Titanium-Catalyzed Enantioselective Synthesis of α-Ambrinol
作者:José Justicia、Araceli G. Campaña、Btissam Bazdi、Rafael Robles、Juan M. Cuerva、J. Enrique Oltra
DOI:10.1002/adsc.200700511
日期:2008.3.7
enantioselective synthesis of the odorant compound (−)-α-ambrinol (96% ee) from commercial geranylacetone. The key steps are a Jacobsen’s asymmetric epoxidation and a titanium-catalyzed stereoselective cyclizationinitiated by radical epoxide opening. The oxirane ring opening proceeds with retention of configuration at the epoxide chiralcenter, giving a secondary alcohol which can be advantageously exploited