A stereoselective synthesis of (E)-1-halo-6,6-dimethyl-2-hepten-4-yne: a key intermediate for terbinafine
作者:Shan-Yen Chou、Chin-Lu Tseng、Shyh-Fong Chen
DOI:10.1016/s0040-4039(00)00511-6
日期:2000.5
A study of the stereoselective halogenation of 6,6-dimethyl-1-hepten-4-yn-3-ol (1) using a series of halogenating agents is described. Of the many agents investigated, boron trichloride is the most successful reagent for stereoselective halogenation (E:Z=9:1max). The resulting (E)-1-halo-6,6-dimethyl-2-hepten-4-yne (2), a keyintermediate for terbinafine, an antifungal agent, is obtained in good yield