公开(公告)号：DE3104388A1

公开(公告)日：1982-10-21

申请号：DE3104388

申请日：1981-02-07

Applicant: BASF AG

Inventor： TONNE PETER DIPL CHEM DR ,  MUELLER HANS-RICHARD DIPL CHEM ,  GOERTH HELMUT DIPL CHEM DR

IPC: C07C309/40 ,  C07C67/00 ,  C07C301/00 ,  C07C303/06 ,  C07C303/22 ,  C07C143/55

Abstract: A process for the preparation of compounds of the formula I I where R is alkyl, by sulfonation, chlorination and nitration starting from an alkylbenzene, wherein the alkylbenzene is sulfonated with from 2.5 to 3, preferably from 2.65 to 2.75, moles of concentrated sulfuric acid per mole of alkylbenzene, the reaction product is then reacted with from about 1.1 to 1.3 moles of chlorine in the absence of a catalyst, the product is subsequently nitrated with highly concentrated nitric acid at elevated temperatures and the nitro compound is isolated.

公开(公告)号：DE2657234A1

公开(公告)日：1978-06-22

申请号：DE2657234

申请日：1976-12-17

Applicant: BASF AG

Inventor： SCHEUERMANN HORST DIPL CHEM DR ,  JERSAK ULRICH DIPL CHEM DR ,  GOERTH HELMUT DIPL CHEM DR

IPC: C07C69/78 ,  B01J27/00 ,  C07C51/00 ,  C07C51/347 ,  C07C51/377 ,  C07C63/06 ,  C07C63/70 ,  C07C67/00 ,  C07C69/76 ,  C07C201/00 ,  C07C201/12 ,  C07C205/12 ,  C07C205/57 ,  C07C205/58 ,  C07C79/12 ,  C07C76/02

Abstract: Prepn. of halobenzenes of formula (I) is described. In the formula, R1 and R4 are each halo; R3 is NO2 or COOR5 (where R5 is H, or a (cyclo)aliphatic, araliphatic or aromatic gp.), R4 can also be H, or when R3 is COOR5, R4 can be NO2. Process comprises (i) reacting an aniline of formula (III) with a halogenating agent in the presence of H2O and an acid, giving a haloaniline of formula (II); and (ii) without isolating the reaction mixt., reacting cpd. (II) with (cyclo)aliphatic or araliphatic alcohols and nitrating agents in the presence of an acid, and with addn. of H2O, at 35 degrees C. Cpd. (I) can also be prepd. by reacting a haloaminobenzoic acid or deriv., of formula (IV), with (cyclo)aliphatic or araliphatic alcohols and nitrating agents, in the presence of an acid and with addn. of H2O, at >=35 degrees C. (I) are used e.g. in the prepn. of medicines, dyes and pesticides. High yields and purity are obtd.