申请人:——
公开号:US20020095037A1
公开(公告)日:2002-07-18
Method of producing thiobarbituric acid derivatives of formula I
1
wherein
R
1
is SH, S
−
M
+
or CH
3
S—, and M
+
is an alkali metal ion, by hydrogenolysis of a compound of formula II
2
wherein R
2
is chlorine or CH
3
O—, with
a) a hydrogenolysis agent in the presence of an inert solvent and by a direct reaction of the hydrogenolysis product with an alkali metal methylate in methanol, or
b) with a hydrogenolysis agent in the presence of an inert solvent and in the presence of a methylation reagent, and subsequently with an alkali metal methylate in methanol, as well as the use of these compound of formula I in the production of
7
-[(
4,6
-dimethoxy-pyrimidin-
2
-yl)thio]-
3
-methylphthalide.
生产式 I 硫代巴比妥酸衍生物的方法
1
式中
R
1
是 SH、S
-
M
+
或 CH
3
S- 和 M
是碱金属离子
是碱金属离子,通过氢解式 II 的化合物
2
其中 R
2
是氯或 CH
3
O-, 与
a) 在惰性溶剂存在下使用氢解剂,氢解产物与甲醇中的碱金属甲酯直接反应,或
b) 在惰性溶剂和甲基化试剂存在下与氢解剂反应,然后在甲醇中与碱金属甲酯反应,以及将这些式 I 化合物用于生产
7
-[(
4,6
-二甲氧基嘧啶-
2
-基)硫]-
3
-甲基酞。