Synthesis of Novel 4,6-Diazaspiro[2.3]hex-1-en-5-ones by the Reaction of Diphenylcyclopropenone Oxime with Isocyanates
作者:Hiroshi Yoshida、Hideki Ohtsuka、Tsuyoshi Ogata、Kiyoshi Matsumoto
DOI:10.1246/cl.1987.659
日期:1987.4.5
Diphenylcyclopropenone oxime hydrochloride (3) was prepared in an 83% yield from diphenylcyclopropenone and hydroxylamine hydrochloride in methanol. The salt 3 reacted with alkyl and aryl isocyanates in the presence of triethylamine to yield 1:2 addition products diazaspiro[2.3]hexenones in good yields.
二苯基环丙烯酮肟盐酸盐 (3) 由
二苯基环丙烯酮和
盐酸羟胺在
甲醇中以 83% 的产率制备。在
三乙胺的存在下,盐 3 与烷基和芳基
异氰酸酯反应,以良好的收率产生 1:2 加成产物二
氮杂螺 [2.3] 己
烯酮。