Enantioselective Diels-Alder Reactions of Carboxylic Ester Dienophiles Catalysed by Titanium-Based Chiral Lewis Acid
作者:Yogesh Choughule、Anand Patwardhan
DOI:10.13005/ojc/320217
日期:2016.4.28
A new titanium-based chiralLewisacid 1 has been developed using (1R,2R)-1,2-bis-(2methoxyphenyl)-ethane-1,2-diol as a chiral vicinal diol ligand. This chiral catalyst was found to exhibit uniformly high enantioselectivity towards carboxylic ester dienophiles in Diels-Alder reactions. The chiral vicinal ligand (1R,2R)-1,2-bis-(2-methoxyphenyl)-ethane-1,2-diol is inexpensive and is easily accessible