A Simple, Efficient, and Highly Enantioselective Synthesis of MS-153 Employing a Chiral Silane Lewis Acid-Promoted Acylhydrazone-Enol Ether [3+2] Cycloaddition
作者:Kristy Tran、James L. Leighton
DOI:10.1002/adsc.200600357
日期:2006.11
reported chiral silane-promoted enol ether-acylhydrazone [3+2] cycloaddition reaction has been applied to a brief and efficientsynthesis of the neuroprotective agent MS-153. Unsatisfactory and variable levels of efficiency and enantioselectivity with the requisite acetaldehyde-derived acylhydrazone occasioned a modification to the chiralsilaneLewis acid, which led to the key cycloaddition step proceeding