A Thio-Diels−Alder Route to the Azocine Ring System. Total Synthesis of (±)-Otonecine
作者:Edwin Vedejs、Rocco J. Galante、Peter G. Goekjian
DOI:10.1021/ja973464e
日期:1998.4.1
A sulfur-based strategy for synthesis of otonecine is described. Key steps include the thio-Diels−Alder trapping of thioketone 8 by the Danishefsky diene, followed by conversion into the enone 27 and internal Michael addition to afford bicyclic thioaminal 28. Selective C−S bond cleavage was achieved after conversion to alcohol 36 or its derivatives 38, resulting in the azocine ring system. The successful