Mild and Efficient Diels-Alder Reaction Using Cationic Dienophiles Generated in situ
作者:Yukihiko Hashimoto、Tadamichi Nagashima、Katsuhiro Kobayashi、Masaki Hasegawa、Kazuhiko Saigo
DOI:10.1016/s0040-4020(01)80149-6
日期:1993.1
On the action of a Lewis acid, 2,2-dimethoxyethyl acrylate is readily transformed into a reactive cationic dienophile, and it reacts with dienes under mild conditions to give Diels-Alder adducts in good yields with high stereo-and/or regioselectivity. 2-Oxopropyl acrylate and 2-oxocyclopentyl acrylate are also found to be converted into alternative cationic dienophiles by a facile procedure.
在路易斯酸的作用下,丙烯酸2,2-二甲氧基乙酯很容易转变为反应性阳离子亲二烯体,并在温和条件下与二烯反应,以高收率和高的立体选择性和/或区域选择性得到狄尔斯-阿尔德加合物。还发现丙烯酸2-氧代丙酯和丙烯酸2-氧代环戊基酯通过简便的方法转化为替代性阳离子二烯亲和剂。