Process for the manufacture of basic oxazine dyestuffs
Abstract
Abstract IN THE PROCESS FOR THE MANUFACTURE OF BASIC OXAZINE DYESTUFFS OF THE FORMULA (9H-BENZO(A)PHENOXAZIN-9-YLIDENE)=N(+)(-R)2 Z(-) IN WHICH R REPRESENTS AN ALKYL GROUP OF FROM 1 TO 4 CARBON ATOMS AND Z$ REPRESENTS CL- OR ZNCL3- BY HEATING AN AMINE OF THE FORMULA 1-((R-)2-N-),3-X''-BENZENE IN WHICH R IS DEFINED AS ABOVE AND X'' REPRESENTS A HYDROGEN ATOM OF AN ALKOXY GROUP OF FROM 1 TO 4 CARBON ATOMS, WITH NITROUS ACID IN AN AQUEOUS-ACETIC ACID OR AQUEOUSALCOHOLIC SOLUTION AND CONDENSING THE P-NITROSO COMPOUND SO OBTAINED WITH B-NAPHTHOL, THE IMPROVEMENT WHICH COMPRISES CONDENSING THE SUSPENSATION OF THE P-NITROSO COMPOUND OBTAINED AS DESCRIBED ABOVE WITH THE B-NAPHTOL WITHOUT BEING INTERMEDIATELY ISOLATED.
Inventors
- 👤 Norbert Ottawa
- 👤 Gustav Schafer
Bibliographic Details
Claims Analysis
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