公开(公告)号：AU541065B2

公开(公告)日：1984-12-13

申请号：AU7776181

申请日：1981-11-23

Applicant: BASF AG

Inventor： TONNE PETER ,  JAEDICKE HAGEN

IPC: C07D275/06

Abstract: A process for the preparation of saccharin by reacting an aqueous hydrochloric acid solution of o-methoxycarbonylbenzenediazonium chloride with sulfur dioxide, wherein (a) the aqueous diazonium salt solution is reacted with sulfur dioxide at from 0 DEG to 100 DEG C. in the presence of a water-immiscible or only partially water-miscible inert organic solvent, (b) in order to decompose the diazonium salt, the reaction mixture is treated simultaneously or subsequently with a diazonium salt decomposition catalyst, (c) the aqueous organic reaction mixture, or the organic phase obtained after removing the aqueous phase, is treated with an oxidizing agent at from 0 DEG to 100 DEG C.

公开(公告)号：DK24083D0

公开(公告)日：1983-01-21

申请号：DK24083

申请日：1983-01-21

Applicant: BASF AG

Inventor： JAEDICKE HAGEN ,  TONNE PETER

IPC: C07C319/14 ,  C07C20060101 ,  C07C67/00 ,  C07C313/00 ,  C07C319/24 ,  C07C323/62 ,  C07C323/66 ,  C07C149

Abstract: o,o'-Dithiodibenzoic acids are prepared by a process wherein a diazotized anthranilic acid or anthranilate is reacted with sulfur dioxide in the presence of an acid, water and a copper salt, and if desired in the presence of an alkali metal iodide, in a 1st stage at from 20 DEG to 50 DEG C. and then in a 2nd stage at from 80 DEG to 100 DEG C. The o,o'-dithiodibenzoic acids obtainable by the process of the invention are useful starting materials for the preparation of crop protection agents, dyes and drugs.

公开(公告)号：BR8200418A

公开(公告)日：1982-11-30

申请号：BR8200418

申请日：1982-01-26

Applicant: BASF AG

Inventor： TONNE PETER ,  LUDWIG WINFRIED ,  KILPPER GERHARD ,  GRIMMER JOHANNES

IPC: C07C231/00 ,  C07C233/00 ,  C07C103/76

Abstract: Anthranilic acid amides are prepared by mixing phthalamic acid with a caustic alkali solution, a catalyst and a hypohalite, allowing the mixture to stand for from 1 to 1,000 seconds, then introducing the amine and thereafter addig acid until the pH of the mixture is from 6 to 8. The anthranilic acid amides obtainable by the process of the invention are valuable starting materials for the preparation of dyes, scents and pesticides.

公开(公告)号：AU7776181A

公开(公告)日：1982-06-03

申请号：AU7776181

申请日：1981-11-23

Applicant: BASF AG

Inventor： TONNE PETER ,  JAEDICKE HAGEN

IPC: C07D275/06

Abstract: A process for the preparation of saccharin by reacting an aqueous hydrochloric acid solution of o-methoxycarbonylbenzenediazonium chloride with sulfur dioxide, wherein (a) the aqueous diazonium salt solution is reacted with sulfur dioxide at from 0 DEG to 100 DEG C. in the presence of a water-immiscible or only partially water-miscible inert organic solvent, (b) in order to decompose the diazonium salt, the reaction mixture is treated simultaneously or subsequently with a diazonium salt decomposition catalyst, (c) the aqueous organic reaction mixture, or the organic phase obtained after removing the aqueous phase, is treated with an oxidizing agent at from 0 DEG to 100 DEG C.

公开(公告)号：CA1019746A

公开(公告)日：1977-10-25

申请号：CA201654

申请日：1974-06-04

Applicant: BASF AG

Inventor： QUADBECK-SEEGER HANS-JUERGEN ,  TONNE PETER

IPC: C07B43/00 ,  B01J21/00 ,  C07B31/00 ,  C07B61/00 ,  C07C20060101 ,  C07C67/00 ,  C07C209/00 ,  C07C209/58 ,  C07C239/00 ,  C07C275/28

公开(公告)号：DK168860B1

公开(公告)日：1994-06-27

申请号：DK24083

申请日：1983-01-21

Applicant: BASF AG

Inventor： JAEDICKE HAGEN ,  TONNE PETER

IPC: C07C319/14 ,  C07C20060101 ,  C07C67/00 ,  C07C313/00 ,  C07C319/24 ,  C07C323/62 ,  C07C323/66

Abstract: o,o'-Dithiodibenzoic acids are prepared by a process wherein a diazotized anthranilic acid or anthranilate is reacted with sulfur dioxide in the presence of an acid, water and a copper salt, and if desired in the presence of an alkali metal iodide, in a 1st stage at from 20 DEG to 50 DEG C. and then in a 2nd stage at from 80 DEG to 100 DEG C. The o,o'-dithiodibenzoic acids obtainable by the process of the invention are useful starting materials for the preparation of crop protection agents, dyes and drugs.

公开(公告)号：CA1269985A

公开(公告)日：1990-06-05

申请号：CA499070

申请日：1986-01-06

Applicant: BASF AG

Inventor： TONNE PETER ,  JAEDICKE HAGEN

IPC: C07D275/04

Abstract: 1,2-Benzisothiazolones and their alkali metal salts are prepared by reacting 2,2'dithiodibenzamides in the presence of oxygen or oxygen donors in an aqueous alkaline medium to which a water-soluble organic solvent may be added and, if desired, freeing the benzisothiazolones from the alkali metal salts with acid.

公开(公告)号：SU1128836A3

公开(公告)日：1984-12-07

申请号：SU3355736

申请日：1981-11-23

Applicant: BASF AG

Inventor： TONNE PETER ,  EDIKE KHAGEN

IPC: C07D275/06

Abstract: A process for the preparation of saccharin by reacting an aqueous hydrochloric acid solution of o-methoxycarbonylbenzenediazonium chloride with sulfur dioxide, wherein (a) the aqueous diazonium salt solution is reacted with sulfur dioxide at from 0 DEG to 100 DEG C. in the presence of a water-immiscible or only partially water-miscible inert organic solvent, (b) in order to decompose the diazonium salt, the reaction mixture is treated simultaneously or subsequently with a diazonium salt decomposition catalyst, (c) the aqueous organic reaction mixture, or the organic phase obtained after removing the aqueous phase, is treated with an oxidizing agent at from 0 DEG to 100 DEG C.

公开(公告)号：IN154617B

公开(公告)日：1984-11-17

申请号：IN1202CA1981

申请日：1981-10-28

Applicant: BASF AG

Inventor： TONNE PETER ,  JAEDICKE HAGEN

IPC: C07D275/06 ,  C07D91/10

Abstract: A process for the preparation of saccharin by reacting an aqueous hydrochloric acid solution of o-methoxycarbonylbenzenediazonium chloride with sulfur dioxide, wherein (a) the aqueous diazonium salt solution is reacted with sulfur dioxide at from 0 DEG to 100 DEG C. in the presence of a water-immiscible or only partially water-miscible inert organic solvent, (b) in order to decompose the diazonium salt, the reaction mixture is treated simultaneously or subsequently with a diazonium salt decomposition catalyst, (c) the aqueous organic reaction mixture, or the organic phase obtained after removing the aqueous phase, is treated with an oxidizing agent at from 0 DEG to 100 DEG C.

公开(公告)号：CA1168247A

公开(公告)日：1984-05-29

申请号：CA390267

申请日：1981-11-17

Applicant: BASF AG

Inventor： TONNE PETER ,  JAEDICKE HAGEN

IPC: C07D275/06

Abstract: or the disclosure: A process for the preparation of saccharin by reacting an aqueous hydrochloric acid solution of o-methoxycarbonylbenzenediazonium chloride with sulfur dioxide, wherein a) the aqueous diazonium salt solution is reacted with sulfur dioxide at from 0 to 100.degree.C in the presence of a water-immiscible or only partially water-miscible inert organic solvent, b) in order to decompose the diazonium salt, the reaction mixture is treated simultaneously or subsequently with a diazonium salt decomposition catalyst, c) the aqueous organic reaction mixture, or the organic phase obtained after removing the aqueous phase, is treated with an oxidizing agent at from 0 to 100.degree.C and d) the organic phase is reacted with aqueous ammonia at from 0 to 50.degree.C and the saccharin is isolated from the aqueous phase in a conventional manner by acidifying with a strong acid.