Highly diastereoselective desymmetrizing intramolecular cyclization of allylstannane with a diketone promoted by Lewis acid or transition metal complex
作者:Takashi Shimada、Naoki Asao、Yoshinori Yamamoto
DOI:10.1016/s0022-328x(00)00897-4
日期:2001.4
The Lewis acid mediated desymmetrizing intramolecularcyclization of prochiral allylstannyl diketone (1) gave a mixture of two diastereomers (2 and 3). Highly diastereoselective synthesis of each of the diastereomers was accomplished by appropriate choice of the Lewis acid. Compound 3 was also produced stereoselectively by using a palladium catalyst instead of Lewis acid.