发明名称 |
Verfahren zur Herstellung von Chinazolinderivaten |
摘要 |
A process for producing 1,2,3,4-tetrahydro-2,4-dioxo-quinazoline-1-yl acetic acid derivatives of the formula (I) in which R<1>, R<2>, R<3> and R<4> are mutually independently hydrogen, halogen, OH, NO2, (C1-C6)alkoxy, (C1-C6)alkyl, halogen-substituted (C1-C6)alkyl; R<5> is hydrogen, (C1-C6)alkyl, phenyl where the alkyl or phenyl radical may also be substituted by halogen atoms; in which an anthranilic acid derivative of formula (II), in which R<1> to R<5> have the above meanings and R<6> is hydrogen, (C1-C6)alkyl or phenyl, where the alkyl or phenyl radical may also be substituted by halogen atoms, is reacted with a metal cyanate and hydrogen chloride in the presence of an inert solvent.
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申请公布号 |
DE19532052(A1) |
申请公布日期 |
1997.03.06 |
申请号 |
DE19951032052 |
申请日期 |
1995.08.31 |
申请人 |
HOECHST AG, 65929 FRANKFURT, DE |
发明人 |
PAPENFUHS, THEODOR, DR., 60433 FRANKFURT, DE;PFIRMANN, RALF, DR., 64347 GRIESHEIM, DE;KRAUSE, STEFAN, DR., 65843 SULZBACH, DE;NEUMANN-GRIMM, DORIS, DR., 60388 FRANKFURT, DE |
分类号 |
C07D239/96;(IPC1-7):C07D239/06 |
主分类号 |
C07D239/96 |
代理机构 |
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