Enhanced Cram selectivity in carbonyl alkylation via‘naked’ anions and anti-Cram selectivity via‘naked’ cuprates
作者:Yoshinori Yamamoto、Koshin Matsuoka
DOI:10.1039/c39870000923
日期:——
EnhancedCramselectivity is observed via the reaction of aldehydes (1) with ‘naked’ anions (2) prepared in situ from RM and Bu4NBr, while anti-Cramselectivity results from the reaction of (1) with ‘naked’ cuprates (4) prepared in situ from R2CuLi and Bu4NBr.
Amphiphilic reactions by means of exceptionally bulky organoaluminum reagents. Rational approach for obtaining unusual equatorial, anti-Cram, and 1,4 selectivity in carbonyl alkylation