公开(公告)号：CH638824A5

公开(公告)日：1983-10-14

申请号：CH760378

申请日：1978-07-12

Applicant: BASF AG

Inventor： SEYBOLD GUENTHER DR ,  EILINGSFELD HEINZ DR

IPC: C07D277/20 ,  C09B23/00 ,  C09B23/01 ,  C09B23/04 ,  C09B55/00 ,  C09B57/00 ,  C09B57/04

公开(公告)号：CH637673A5

公开(公告)日：1983-08-15

申请号：CH830078

申请日：1978-08-04

Applicant: BASF AG

Inventor： EILINGSFELD HEINZ DR ,  HANSEN GUENTER DR ,  SEYBOLD GUENTHER DR ,  ZEIDLER GEORG

IPC: C09B31/14

公开(公告)号：DE2617807A1

公开(公告)日：1977-11-03

申请号：DE2617807

申请日：1976-04-23

Applicant: BASF AG

Inventor： EILINGSFELD HEINZ DR ,  SEYBOLD GUENTHER DR

IPC: C07D275/04 ,  C07D275/02

Abstract: 3-amino-5-nitro benzisothiazoles of formula (I) is prepd. by ring closure of 4-nitro anthranilic acid thioamides. (in which X is CN, carbomyl, or a carboxylic ester gp., pref. CN or carboxylic ester). In an example, 13.2 pts. 3-cyano 5-nitro anthranilic acid thioamide is suspended in 100 vols. acetic acid and 7.6 parts 50% H2O2 added with strong string at room temp. After 6h stirring, the orange-red crystalline prod. is filtered off, with a yield of 13g. (99% theory) and m.pt. 254-256 degrees C. Used for prepn. at azo dyes, esp. blue or green dyes for polyesters and cellulose acetates.