申请人:Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
公开号:US04003936A1
公开(公告)日:1977-01-18
As new compound, a series of 2-hydrocinnamoyl-1,3-cyclopentanedione derivative of the general formula: ##STR1## WHEREIN Ar stands for a mono-valent aromatic radical, for example, phenyl and 3,4-methylenedioxy-phenyl, substituted or unsubstituted, have been found to have an activity to inhibit the action of tyrosine hydroxylase and to be useful as hypotensive agent. These new compounds may be produced by condensing 2-acetyl-1,3-cyclopentanedione with an aromatic aldehyde of the formula Ar-CHO wherein Ar is as defined, according to Claisen-Schmidt condensation, followed by the hydrogenation of the condensation product obtained, or the new compounds may also be produced by reacting 2-acetyl-1,3-cyclopentanedione with an aromatic halide of the formula Ar-CH.sub.2 X wherein Ar is as defined and X is a halogen, for example, in liquid ammonia and in the presence of an alkali metal amide.
作为新化合物,一系列具有以下通用式的2-羟基肉桂酰基-1,3-环戊二酮衍生物已被发现具有抑制酪氨酸羟化酶作用并作为降压剂有用:##STR1## 其中Ar代表一个一价芳香基团,例如苯基和3,4-亚甲二氧基苯基,可以是取代或未取代的。这些新化合物可以通过将2-乙酰基-1,3-环戊二酮与具有通式Ar-CHO的芳香醛(其中Ar如上定义)按照克莱森-施密特缩合反应,随后氢化所得的缩合产物来制备,或者这些新化合物也可以通过在液氨中,在碱金属酰胺的存在下,将2-乙酰基-1,3-环戊二酮与具有通式Ar-CH.sub.2 X的芳香卤代物(其中Ar如上定义,X是卤素,例如卤素)反应来制备。