Intramolecular Asymmetric Heck Reactions: Evidence for Dynamic Kinetic Resolution Effects
作者:Michael C. McDermott、G. Richard Stephenson、David L. Hughes、Andrew J. Walkington
DOI:10.1021/ol0606132
日期:2006.7.1
Enantioselectivity of the cyclization of 1 varies at different stages in the reaction. X-ray crystallography has shown that 1 exists as enantiomerically pure (M) and (P) chiral helical structures defined by the relative orientations of the arene, amide, and alkene. The relative rates of interconversion of the rotamers of 1 have been established, leading to mechanistic proposals to account for the variation of ee based on kinetic resolution effects.