Lewis acid promoted highly diastereoselective desymmetric intramolecular cyclization of allylstannane with a diketone
摘要:
The Lewis acid mediated desymmetric intramolecular cyclization of prochiral allylstannyl diketone 1 gave a mixture of two diastereomers 2 and 3. Highly diastereoselective synthesis of each diastereoisomer was accomplished by proper choice of the Lewis acids. (C) 1997 Elsevier Science Ltd. All rights reserved.
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.