Formation and cyclization of N′-(benzoyloxy)benzenecarboximidamides
摘要:
The formation of N'-(benzoyloxy)benzenecarboximidamides and their subsequent cyclization to 3,5-disubstituted 1,2,4-oxadiazoles in different solvents were studied. A probable reaction mechanism was proposed on the basis of the obtained results.
Benzamidoxime and cyanic acid react to give O-carbamoyl-benzamidoxime, and not the oxime of benzoylurea as generally admitted. 3-Phenyl-5-hydroxy-l,2,4-oxa-diazole is quantitatively formed by reacting hydroxylamine on carbamoylbenzami-dine.
Imidazole derivatives and antiepileptics comprising said imidazole
申请人:Mitsui Toatsu Chemicals, Incorporated
公开号:US05112841A1
公开(公告)日:1992-05-12
Described herein are imidazole derivatives having a specific structure and satisfactory as antiepileptics from the standpoint of the strength of action, prolonged action and side effects as well as their preparation processes.
Imidazole derivatives and antiepileptics comprising said imidazole derivatives as effective ingredients
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0446010A1
公开(公告)日:1991-09-11
Described herein are imidazole derivatives having a specific structure (I) and satisfactory as antiepileptics from the standpoint of the strength of action, prolonged action and side effects as well as their preparation processes:-
wherein R₁ means
R₃ = optionally substituted phenyl
Z = S or O
R₂ = H or lower alkyl
本文描述的是具有特定结构(I)的咪唑衍生物,从作用强度、作用持续时间和副作用以及制备工艺的角度来看,它们作为抗癫痫药是令人满意的:--
其中 R₁ 指
R₃ = 任选取代的苯基
Z = S 或 O
R₂ = H 或低级烷基
Tikhonov, A. Ya.; Belova, N. V.; Volodarskii, L. B., Journal of Organic Chemistry USSR (English Translation), 1985, vol. 21, # 1, p. 177 - 183
作者:Tikhonov, A. Ya.、Belova, N. V.、Volodarskii, L. B.、Gatilov, Yu. V.