There is described a process for the production of a 1,4-dihydro-4-oxo-quinoline-2-carboxylic acid, or a salt, ester or amide thereof, which comprises cyclization of a corresponding 2-aminobenzoyl pyruvic acid or an ester thereof, and if desired or necessary converting the resulting product to an appropriate salt, ester or amide thereof, or vice versa.
Process for the production of 3-amino-4,6-diacetyl phenol or a derivative thereof
申请人:FISONS plc
公开号:EP0052280A1
公开(公告)日:1982-05-26
There is disclosed a process for the production of 3-amino-4,6-diacetyl phenol, or a derivative thereof, which comprises reacting a compound of formula III,
or a protected derivative thereof,
in which R is acetyl or hydrogen, with an excess of acetyl chloride or acetyl bromide and aluminium chloride or aluminium bromide at a temperature of from 30° to 50°C in an halogenated hydrocarbon solvent.
本发明公开了一种生产 3-氨基-4,6-二乙酰基苯酚或其衍生物的工艺,该工艺包括将式 III 的化合物或其受保护的衍生物(其中 R 为乙酰基或氢)与过量的乙酰氯或乙酰溴和氯化铝或溴化铝在卤代烃溶剂中进行反应,反应温度为 30°C 至 50°C。
A process for the production of 1,4-dihydro-4-oxo-quinoline-2-carboxylic acids, or salts, esters or amides thereof and intermediates therefor