BF<sub>3</sub>-Catalyzed Skeletal Rearrangement of 7-En-2-ynones to <i>endo</i>-Type Cyclic Dienes
作者:Daisuke Sato、Yuichiro Watanabe、Keiichi Noguchi、Junichiro Kanazawa、Kazunori Miyamoto、Masanobu Uchiyama、Akio Saito
DOI:10.1021/acs.orglett.0c00949
日期:2020.6.5
Transition-metal-catalyzed cycloisomerization reactions with skeletal rearrangement of 1,n-enynes to afford cyclic dienes (particularly exo-cyclization products) have been well studied. However, there are few reports on the nonmetal-catalyzed skeletal rearrangement of enynes and skeletal rearrangement of electron-deficient enynes such as n-en-2-ynones. Here, we describe BF3·MeCN-catalyzed synthesis
具有1骨骼重排,正烯炔,得到的环状二烯过渡金属催化环异构反应(尤其是外切-cyclization产品)已经被很好地研究。然而,关于非金属催化的炔烃的骨架重排和缺电子的炔烃(如n-en-2-ynones)的骨架重排的报道很少。在这里,我们描述了BF 3 ·MeCN中催化的3- alkylidenecyclohexenes合成由7-烯-2- ynones,代表的1,6-烯炔到第一非金属催化重排骨骼内切型环状二烯。