Process and intermediates for the preparation of oxophthalazinyl

Details Process and intermediates for the preparation of oxophthalazinyl Process and intermediates for the preparation of oxophthalazinyl

1992-06-30

1993-01-26

Berch, Mark L.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D51900, C07D41706, C07D48704, C07D47104

Patent

active

051823918

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 thiazoloyridinyl side chains.

REFERENCES:
patent: 5034051 (1991-07-01), Kune

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