BINOLate–Magnesium Catalysts for Enantioselective Hetero-Diels–Alder Reaction of Danishefsky's Diene with Aldehydes
作者:Haifeng Du、Xue Zhang、Zheng Wang、Hongli Bao、Tianpa You、Kuiling Ding
DOI:10.1002/ejoc.200701223
日期:2008.5
An efficient catalytic enantioselective hetero-Diels–Alder reaction of Danishefsky's diene with aldehydes using the magnesium binaphthoxide system has been developed, affording a variety of 2-substituted 2,3-dihydro-4H-pyran-4-ones in high yields and with excellent ee values. The aggregation behavior and nonlinear effect of the catalytic system, as well as the remarkable stereoelectronic effects of
已开发出一种使用联萘氧化镁系统的丹麦谢夫斯基二烯与醛的高效催化对映选择性杂 Diels-Alder 反应,以高产率和优异的性能提供各种 2-取代的 2,3-二氢-4H-吡喃-4-酮。 ee 值。还研究了催化体系的聚集行为和非线性效应,以及配体对催化的显着立体电子效应。基于分离出的反应中间体的结构、产物的立体化学以及从非线性效应研究中获得的信息,提出了一个合理的不对称归纳模型。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)