Stereocontrolled cyclization of enynols and allenynols with (η2-propene)Ti(O-i-Pr)2. Important role of unprotected hydroxy group at a remote position
作者:Hirokazu Urabe、Fumie Sato
DOI:10.1016/s0040-4039(98)01572-x
日期:1998.10
Stereochemistry of (eta(2)-propene)Ti(O-i-Pr)(2)-mediated cyclization of enynols and allenynols is efficiently controlled by their remote hydroxy group, showing good diastereaselectivities as high as 82:18-98.5:1.5, which are uniformly superior to those observed for the corresponding t-BuMe2Si ethers. (C) 1998 Elsevier Science Ltd. AII rights reserved.