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.