Enantioselective Organocatalytic Hantzsch Synthesis of Polyhydroquinolines
作者:Christopher G. Evans、Jason E. Gestwicki
DOI:10.1021/ol901114f
日期:2009.7.16
The four-component Hantzsch reaction provides access to pharmaceutically important dihydropyridines. To expand the utility of this method, we have developed a route under organocatalytic conditions with good yields and excellent ee’s. Through catalyst screening, we found that a BINOL−phosphoric acid allowed enantioselectivesynthesis of six-membered heterocycles with a variety of substitution patterns