申请人:Synkola, s.r.o.
公开号:EP2385034A2
公开(公告)日:2011-11-09
It is disclosed a process for the preparation of 1-nitro-4-oxobutanylamides of general formula Ia and Ib
or opposite enantiomers thereof,
wherein R1 is H, alyl, alkyloxycarbonyl, arylalkyloxycarbonyl with a number of carbon atoms up to 24, or the same as in R2, R2 represents alkyl, cycloalkyl or phenylalkyl with up to 24 carbon atoms, and R3 represents alkyl, alkylphenyl, phenylalkyl or phenyl, substituted phenyl, alkoxyphenylalkyl with up to 24 carbon atoms, by the reaction of the
with 2-nitroethenylamides of general formula IIIa and/or IIIb,
where R1, R2 and R3 are as cited above,
in the presence of organic catalysts and co-catalysts in organic solvent, water, in solution of inorganic salts in water or in the mixture of organic solvents and water or in the mixture of solutions of inorganic salts in water and organic solvents at the temperature between -20 and +50 °C.
本发明公开了通式 Ia 和 Ib 的 1-硝基-4-氧代丁酰胺的制备方法
或其对映体的工艺、
其中 R1 是碳原子数不超过 24 的 H、烯丙基、烷氧羰基、芳烷氧羰基,或与 R2 相同,R2 代表碳原子数不超过 24 的烷基、环烷基或苯基烷基,R3 代表碳原子数不超过 24 的烷基、烷基苯基、苯基烷基或苯基、取代苯基、烷氧基苯基烷基,通过以下反应制得
与通式 IIIa 和/或 IIIb 的 2-硝基乙烯酰胺反应、
其中 R1、R2 和 R3 如上文所述、
在有机催化剂和助催化剂存在下,在有机溶剂、水、无机盐水溶液或有机溶剂和水的混合物或无机盐水溶液和有机溶剂的混合物中,温度在 -20 至 +50 °C 之间。