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初中招生专利名称：Synthesis of 2-piperazinones and 1,4-diaza-2-keto-cycloheptanes
发明人：John T. Lai
申请号：US06/043294彩旗规格
申请日：19790529
酒席菜谱大全公开号：US04240961A
公开日：
我形我秀>冬瓜玉米汤
19801223
专利内容由知识产权出版社提供
摘要：Substituted 2-piperazinones are prepared by reacting a substituted 1,2- diamine with (a) an acyclic or cyclic cyanohydrin acetate, (b) a haloform, and (c) alkali metal hydroxide, in the prence of a suitable organic solvent, at ambient pressure and temperature preferably lower than about 20° C. In an analogous manner, substituted 1,4-diaza-2-keto- cycloheptanes are prepared by reacting substituted 1,3-propane-diamines. In this synthesis, referred to as "the cyanohydrin acetate synthesis," the reaction is accelerated with a pha transfer catalyst lected from the group consisting of a polyether, an onium salt, and a tertiary amine. This synthesis yields predominantly a 2-keto-diazacycloalkane with substituents desirably substituted on carbon atoms on either side of the N.sup.4 atom of the diaza ring.
申请人：GOODRICH, B F CO THE
代理人：Alfred D. Lobo,J. Hughes Powell, Jr.
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