申请人:STAMICARBON B.V.
公开号:EP0192299A1
公开(公告)日:1986-08-27
The invention provides a process for the preparation of pyrimidine, 2-methyl- and/or 2-ethylpyrimidine, characterized in that for pyrimidine a nitrogen reactant, chosen from the reaction product of formamide with 1,3-diaminopropane in the liquid phase,
1-amino-3-formamidopropane, 1,4,5,6-tetrahydropyrimidine and/or 1,3-diformamidopropane, that for 2-methyipyrimidine 1-amino-3-acetamidopropane. 2-methyl-1,4,5,6- tetrahydropyrimidine and/or 1,3-diacetamidopropane, and that for 2-ethylpyrimidine 1-amino-3-propionamidopropane, 2-ethyl-1,4,5,6-tetrahydropyrimidine and/or 1,3- dipropionamidopropane is/are contacted with a palladium-containing catalyst, this being effected in the gas phase at a temperature between 200 and 550 □C and in the presence of a carbon monoxide-hydrogen reactant, and that pyrimidine, 2-methyl-and/or 2-ethyl-pyrimidine is recovered from the reaction mixture obtained.
本发明提供了一种制备嘧啶、2-甲基和/或 2-乙基嘧啶的工艺,其特征在于,对于嘧啶,氮反应物选自甲酰胺与 1,3-二氨基丙烷在液相中的反应产物、
1-氨基-3-甲酰胺基丙烷、1,4,5,6-四氢嘧啶和/或 1,3-二甲酰胺基丙烷,2-甲基嘧啶的反应物为 1-氨基-3-乙酰胺基丙烷。2-甲基-1,4,5,6-四氢嘧啶和/或 1,3-二乙酰氨基丙烷,以及 2-乙基-1,4,5,6-四氢嘧啶和/或 1,3-二丙酰氨基丙烷,都要与含钯催化剂接触、在气相中,温度介于 200 ℃ 和 550 ℃ 之间,并有一氧化碳-氢反应物存在的情况下进行,从得到的反应混合物中回收嘧啶、2-甲基和/或 2-乙基嘧啶。