Formal Synthesis of Galantinic Acid by Oxo-Diels-Alder Methodology
作者:Wojciech Chaładaj、Janusz Jurczak
DOI:10.1002/ejoc.201001296
日期:2011.3
a simple and efficient enantioselective route to galantinic acid. The strategy is based on a highly enantioselective hetero-Diels-Alder (HDA) reaction of 3-(4-methoxybenzyloxy)propanal with Danishefsky's diene followed by selective introduction of further stereogenic centers thanks to the rigidity of the dihydropyran ring. The key HDA reaction is catalyzed by a new salen Cr III complex bearing a 1,1-diphenylethyl