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
这种通信提供了一种简单而有效的对映选择性途径来获得加兰宁酸。该策略基于 3-(4-甲氧基苄氧基) 丙醛与Danishefsky's 二烯的高度对映选择性杂-Diels-Alder (HDA) 反应,然后由于二氢吡喃环的刚性,选择性引入进一步的立体中心。关键的 HDA 反应是由在水杨基部分的 3 位上带有 1,1-二苯乙基取代基的新型 Salen Cr III 配合物催化的。