Process for the preparation of (pyridinylidene)-phthalides

Details Process for the preparation of (pyridinylidene)-phthalides Process for the preparation of (pyridinylidene)-phthalides

2005-05-17

2005-05-17

Solola, Taofiq (Department: 1626)

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

Reexamination Certificate

active

06894164

ABSTRACT:
A process for the preparation of phthalazines by preparing intermediate (pyridinylidene)-phthalides starting from 3-oxo-1,3-dihydro-isobenzofuran-1-carboxylic acids and pyridinecarbaldehydes, is described.

REFERENCES:
patent: 6297257 (2001-10-01), Napoletano et al.
patent: 6329370 (2001-12-01), Napoletano et al.
patent: 6340684 (2002-01-01), Napoletano et al.
R.H. Prager, et al.,Tetrahedron, vol. 40, No. 9, pp. 1517-1522 (1984).
J. Ploquin, et al.,J. Heterocycle. Chem., vol. 17, No. 5, pp. 961-973 (1980).

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