High Diastereoselectivity in the Yang Photocyclization via Remote Hydrogen Abstraction Reaction
作者:Mi Jang、Bong Ser Park
DOI:10.1002/bkcs.10900
日期:2016.9
1‐Benzoyl‐1‐(o‐alkoxyphenyl)cyclopropanes undergo Yang photocyclization to form dihydrobenzo‐pyranols in a stereospecific manner. The cyclopropyl group at alpha position to carbonyls gives not only a bias in the most stable geometries of the starting ketones but also conformational restriction on geometries of biradical intermediates. More importantly, intramolecular hydrogen bonds seem to give an