BAASNER, B.;KLAUKE, E., J. FLUOR. CHEM., 45,(1989) N, C. 417-430
作者:BAASNER, B.、KLAUKE, E.
DOI:——
日期:——
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作者:BAASNER B.、 KLAUKE E.
DOI:——
日期:——
Process for the preparation of 5-fluorocytosine
申请人:Bayer Aktiengesellschaft
公开号:US04703121A1
公开(公告)日:1987-10-27
5-fluorocytosine is prepared by reacting 2,5-difluoro-4-chloro-pyrimidine with a proton acid in the presence of water to yield 2-hydroxy-4-chloro-5-fluoropyrimidine and reacting the 2-hydroxy-4-chloro-5-fluoropyrimidine with ammonia to yield 5-fluoro-cytosine.
Process for the selective hydrogenation of chlorine-containing
申请人:Bayer Aktiengesellschaft
公开号:US04764611A1
公开(公告)日:1988-08-16
Chlorine-containing pyrimidines are selectively hydrogenated with elimination of hydrogen chloride, without other substituents and/or the aromatic ring being significantly attacked, by using a hydrogenation catalyst and a hydrogen chloride acceptor. This process gives predominantly new pyrimidines.