公开(公告)号：DE2241717A1

公开(公告)日：1974-03-14

申请号：DE2241717

申请日：1972-08-24

Applicant: BASF AG

Inventor： NIESS ROLF DR ,  EILINGSFELD HEINZ DR

IPC: C07D495/04 ,  C07D63/18

Abstract: Title cpds. are of formula (I): (where R' is H, alkyl, opt. substd. phenyl or carbalkoxy R2 is H, alkyl, Cl, Br, CN, nitro, acyloxy or acylamino; R3 is H, alkyl, opt. substd. phenyl or OH; R4 is CN, nitro, methylsulphonyl, nitrophenyl, carbalkoxy, formyl, alkanoyl or aroyl). They are obtained by cyclising cpds. such as 3-cyano-2-thio-pyridone or 3-cyano-2-(acetyl methylene) mercapto-4:6-dimethyl pyridine, in the presence of a base.

公开(公告)号：DE3260927D1

公开(公告)日：1984-11-15

申请号：DE3260927

申请日：1982-03-05

Applicant: BASF AG

Inventor： NIESS ROLF DR ,  SCHAEFFER KARL

IPC: C07D209/58 ,  C09B5/24 ,  C09B5/62

Abstract: An improvement in the process for the preparation of dispersed dyes of compounds of the formula (I) where X is >O or >NH and R is C1-C12-alkyl, C2-C6-hydroxyalkyl, alkoxyalkyl of 3 to 12 carbon atoms in total, C5-C8-cycloalkyl, phenoxy-C2- or-C3-alkyl, phenyl-C1-C4-alkyl or phenyl-C1-C4-alkoxy-C2- or -C3-alkyl, by reacting a compound I where R is H with an amine of the formula R-NH2 in a liquid under the influence of heat, wherein the reaction is carried out in water, in the presence or absence of a cationic or non-ionic surfactant. Very pure dyes are obtained with a high space/time yield.

公开(公告)号：DE2150686A1

公开(公告)日：1973-04-19

申请号：DE2150686

申请日：1971-10-12

Applicant: BASF AG

Inventor： NIESS ROLF DR ,  EILINGSFELD HEINZ DR

IPC: C07D239/54 ,  C07D239/557 ,  C07D51/30

Abstract: Novel cpds. are of formula (I): (where R' is H, opt. substd. alkyl, cycloalkyl or aralkyl; R2 is as R1 or phenyl or opt. substd. heterocyclyl; R3 and R4 = as R1 or aryl; or NR3R4 is a heterocyclic radical; R5 is sulphonyl or acyl). (I) are inters. for dyestuffs and pharmaceuticals.

公开(公告)号：DE2319237A1

公开(公告)日：1974-10-31

申请号：DE2319237

申请日：1973-04-16

Applicant: BASF AG

Inventor： EILINGSFELD HEINZ DR ,  NIESS ROLF DR ,  PERLINGER HANS DR

IPC: C07D263/58 ,  C07D85/48

公开(公告)号：DE2248232A1

公开(公告)日：1974-04-11

申请号：DE2248232

申请日：1972-10-02

Applicant: BASF AG

Inventor： NIESS ROLF DR ,  EILINGSFELD HEINZ DR

IPC: C07D487/04 ,  C07D51/58

公开(公告)号：DE3323975A1

公开(公告)日：1984-01-12

申请号：DE3323975

申请日：1983-07-02

Applicant: BASF AG

Inventor： REISSENWEBER GERNOT DR ,  NIESS ROLF DR

IPC: C07C215/76 ,  C07C91/44

Abstract: Process for the preparation of 2-amino-5-nitrophenol by reacting isatin with alkali metal peroxodisulphate in the presence of sulphuric acid and subsequently with nitric acid to give N-(2-hydroxy-4-nitrophenyl)-oxalamide, followed by hydrolysis of the amide with alkali metals and/or alkaline earth metals. 2-amino-5-nitrophenol, which can be prepared by the process according to the invention, is a valuable starting material for the preparation of dyestuffs, pesticides and pharmaceuticals.

公开(公告)号：CH608010A5

公开(公告)日：1978-12-15

申请号：CH321175

申请日：1975-03-13

Applicant: BASF AG

Inventor： NIESS ROLF DR

IPC: C07D275/04 ,  C09B29/00 ,  C09B29/045 ,  C09B29/08

Abstract: Process for the manufacture of 3-amino-2,1-benzisothiazoles by oxidative ring closure of o-aminothiobenzamides, comprising the improvement of conducting the reaction in about 85 to 110% sulfuric acid which serves as solvent and oxidizing agent. 3-Amino-2,1-benzisothiazoles are important diazo components for blue azo dyes.

公开(公告)号：DE2248231A1

公开(公告)日：1974-04-11

申请号：DE2248231

申请日：1972-10-02

Applicant: BASF AG

Inventor： NIESS ROLF DR ,  EILINGSFELD HEINZ DR

IPC: C07D513/04 ,  C07D99/10