5-pyridyl-pyridine-2 (1H) -ones of general formula I
in which R1 is an amino group, R2 is a hydrogen atom or a lower alkyl group and R3 is a 4-, 3- or 2-pyridyl group are prepared by reaction of 1-R2-1-oxo-2-R3-3-dimethyl- aminopropane (II) with malonamide undersolid-liquid or liquid-liquid phase transfer catalysis conditions to obtain 1,2-dihydro-2-oxo-6-R2-5-R3-nicotin-amide (IV), or by reaction of II with cyanoacetamide under solid-liquid or liquid-liquid phase transfer catalysis conditions to obtain 1,2-dihydro-2-oxo-6-R2-5-R3-nicotinonitrile (III) and partially hydrolizing III to yield IV; finally the carbamoyl group of IV is converted to amino and 1,2-dihydro-2-oxo-6-R2-5-R3-3-aminopyridin-2-ones are obtained.
通式 I 的 5-
吡啶基
吡啶-2(1H)-
酮
其中 R1 为
氨基,R2 为
氢原子或低级烷基,R3 为 4-、3-或 2-
吡啶基,通过 1-R2-1-oxo-2-R3-3-dimethyl- aminopropane (II) 与丙二
酰胺在固液或液液相转移催化条件下反应制备得到 1、2-二
氢-2-
氧代-6-R2-5-R3-烟
酰胺(IV),或者在固液或液液相转移催化条件下,将 II 与
氰乙
酰胺反应,得到 1,2-二
氢-2-
氧代-6-R2-5-R3-
烟腈(III),然后将 III 部分
水解,得到 IV;最后将 IV 的
氨基甲酰基转化为
氨基,得到 1,2-二
氢-2-
氧代-6-R2-5-R3-3-
氨基吡啶-2-
酮。