Process and indazole intermediates for the preparation of oxopht

Details Process and indazole intermediates for the preparation of oxopht Process and indazole intermediates for the preparation of oxopht

1991-09-30

1992-12-15

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483625, C07D23156, C07D51900, A61K 31495, A61K 31445

Patent

active

051718626

ABSTRACT:
Oxophthalazinyl acetic acids having benzothiazole side chains are prepared by reacting an oxophthalazinyl thioacetamide acetate with hydrogen sulfide and a nitrophenyl compound having a reactive group such that the benzothiazole side chain may be formed by ring closure involving the thioacetamide group. The oxophthalazinyl thioacetamide may be prepared by reacting the corresponding cyanomethyloxophthalazinyl acetate with hydrogen sulfide in the presence of tertiary amines. Analogous indazole and oxopyridopyridazinone acetic acids may be prepared similarly, as well as oxophthalazinyl, indazole and oxopyridopyridazinone acetic acids having thiazolopyridinyl side chains.

REFERENCES:
patent: 4946966 (1990-08-01), King

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