发明名称 |
FOERFARANDE FOER FRAMSTAELLNING AV 2,4-DIAMINO-5-(3',4',5'-TRIMETOXIBENSYL)PYRIMIDIN. |
摘要 |
The invention relates to an improved process for the preparation of 2,4-diamino-5-(3',4',5'-trimethoxy-benzyl)-pyrimidine of the general formula I <IMAGE> by reacting a compound of the general formula II <IMAGE> (wherein R is an alkyl group having 1-4 carbon atoms) with guanidine, which comprises preparing the said compound of the general formula II by reacting alpha -(3,4,5-trimethoxy-benzal)- beta -methoxy-propionitrile of the formula III <IMAGE> with ethylene glycol monoalkylether of the general formula IV HO-CH2-CH2-OR (IV> (wherein R as as stated above) in the presence of an alkali metal alkoxide at a temperature between 60 DEG and 90 DEG and reacting the compound of the general formula II thus obtained - if desired without isolation - with guanidine in the presence of an alkanol having 4-8 carbon atoms. The advantage of the process is that it is economical and can be carried out with high yields even on industrial scale and provides a product of high purity. The compound of the formula I obtained is a known chemotherapeutical drug. |
申请公布号 |
FI76790(B) |
申请公布日期 |
1988.08.31 |
申请号 |
FI19820002268 |
申请日期 |
1982.06.24 |
申请人 |
E GY T GYOGYSZERVEGYESZETI GYAR |
发明人 |
BECK, IVAN;DIETZ, ANDRAS;LADANYI, LASZLO;TAKACS, ZOLTAN;BIRO, IMRE;JAKFALVI, ELEMER;SIMONYI, ISTVAN |
分类号 |
C07C255/53;C07D239/48;C07D239/49;C07D239/50 |
主分类号 |
C07C255/53 |
代理机构 |
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