Site-recognition of one of the two alkoxy carbonyl groups present in the dienophile for Diels–Alder reaction
作者:Yuichi Kobayashi、Yohei Kiyotsuka
DOI:10.1016/s0040-4039(01)02031-7
日期:2001.12
Recognition of one alkoxy carbonyl group from the two in a molecule by a Lewis acid was investigated using 1a–e in the Diels–Alder reaction with diene 6. Combination of 1a and BF3·OEt2 provided the highest efficiency to afford 7a, thus showing evidence for the site-selective coordination of BF3·OEt2 to the MOM-oxy carbonyl group in 1a. Furthermore, the generality and high reactivity of this combination
路易斯酸在分子与二烯6的Diels-Alder反应中使用1a - e识别了一个分子中两个分子中一个烷氧基羰基的识别作用。的组合图1A和BF 3 ·OET 2提供了最高的效率,得到图7a,从而示出了用于BF的位点选择性协调证据3 ·OET 2在MOM -氧基羰基1A。此外,该组合的通用性和高反应性被证实与二烯11 - 14。