Asymmetric Hetero-Diels–Alder Reaction of Danishefsky’s Dienes with α-Carbonyl Esters Catalyzed by an Indium(III)–PyBox Complex
作者:Bei Zhao、Teck-Peng Loh
DOI:10.1021/ol400841s
日期:2013.6.21
An efficient catalytic enantioselective hetero-Diels–Alder reaction of Danishefsky’s dienes with α-carbonyl esters using a chiral In(III)–pybox complex has been demonstrated. This protocol offers several advantages, including mild reaction conditions, relatively low catalyst loading, and good to excellent enantioselectivities. Furthermore, the absolute configurations of the new alkynyl-containing products
已证明使用手性In(III)-pybox配合物可以有效地催化Danishefsky二烯与α-羰基酯的对映选择性杂Diels-Alder反应。该方案具有几个优点,包括温和的反应条件,相对较低的催化剂负载量以及良好的对映选择性。此外,通过CD光谱结合TD-DFT计算确定了新的含炔基产物的绝对构型。