Pyridazinone manufacture

Details Pyridazinone manufacture Pyridazinone manufacture

1989-09-13

1991-03-26

Daus, Donald G.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D23714

Patent

active

050030680

ABSTRACT:
An improved method for the manufacture of a substituted 1,4-dihydro-4-oxopyridazine which comprises the step of reacting a glyoxyclic acid halide phenylhydrazone with 3-pyrrolidinyl-2-alkenoic acid ester.

REFERENCES:
patent: 2783232 (1957-02-01), Gutmann
patent: 4561881 (1985-12-01), Labovitz
patent: 4623378 (1986-11-01), Durrr
Plescia, S. et al. Jour. Het. Chem. vol. 18, pp. 333-334 (1981).

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