发明名称 |
VERFAHREN ZUR HERSTELLUNG VON P-ALKYL- UND P-ARYLSULFONYLBENZOESÄURE-DERIVATE |
摘要 |
<p>A process for preparing a compound of formula (I),ed alkyl or phenyl, R2 is COOH, and R3 and R4 are independently selected from hydrogen, halo, haloalkyl, nitro, hydroxy, alkoxy, haloalkoxy or alkoxyalkoxy; which process comprises oxidising a compound of formula (II) <IMAGE> (II) where R1, R3 and R4 are as defined in relation to formula (I) and R5 is H, halo or C1-4 alkyl with sodium hypochlorite or sodium chlorite in the presence of a catalytic amount of a ruthenium or palladium compound and a phase transfer catalyst in an organic solvent at a pH of 7-11.</p> |
申请公布号 |
DE69407783(T2) |
申请公布日期 |
1998.04.16 |
申请号 |
DE1994607783 |
申请日期 |
1994.04.29 |
申请人 |
ZENECA LTD., LONDON, GB |
发明人 |
BROWN, STEPHEN MARTIN, UPPER CUMBERWORTH, HUDDERSFIELD HD8 8NX, GB;BOWDEN, MARTIN, CHARLES, BRIGHOUSE WEST YORKSHIRE HD6 3LX, GB;MOORHOUSE, KEITH, OAKES HUDDERSFIELD HD3 4FH, GB |
分类号 |
C07B61/00;C07C315/04;C07C317/44;(IPC1-7):C07C315/04 |
主分类号 |
C07B61/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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