Pyrimidinesynthesis starting from acrylonitrile has been known since the 1960s. The new Lewis acid-catalyzed condensation reaction allows the synthesis of 4-aminopyrimidines starting from the easily accessible chemical acrylonitrile without the need for carcinogenic chemicals and costly derivatization in up to 90% yield. The method is versatile and applicable for industrial-scale synthesis of biologically
Preparation of 2-methyl-4-amino-5-aminomethylpyrimidine
申请人:BASF Aktiengesellschaft
公开号:US06365740B1
公开(公告)日:2002-04-02
2-Methyl-4-amino-5-aminomethylpyrimidine of the formula 1
is prepared by reacting 2-methyl-4-amino-5-alkoxymethylpyrimidine of the formula 2
where R=C1-C6-alkyl, with ammonia in the presence of a catalyst.
Characterization of 2-Methyl-4-amino-5-(2-methyl-3-furylthiomethyl)pyrimidine from Thermal Degradation of Thiamin
作者:Jin-Woo Jhoo、Ming-Chi Lin、Shengmin Sang、Xiaofang Cheng、Nanqun Zhu、Ruth E. Stark、Chi-Tang Ho
DOI:10.1021/jf011591v
日期:2002.7.1
Thiamin hydrochloride was thermally degraded in phosphate buffer (pH 6.5) at 110 degreesC for 2 h. A major decomposition product was isolated by column chromatography and structurally identified by spectrometric techniques ((1)H NMR, (13)C NMR, 2D NMR, and MS) as 2-methyl-4-amino-5-(2-methyl-3-furylthiomethyl)pyrimidine (MAMP). The possible formation pathway of MAMP was studied using two model systems. It is proposed that MAMP is formed by nucleophilic attack of 2-methyl-3-furanthiol on the thiamin.
LITVAK, M. M., KATALIZ. I KATAL. PROTSESSY XIMFARMPROIZVODSTV, M.,(1989) S. 54