Benzoheterocyclic compounds

Details Benzoheterocyclic compounds Benzoheterocyclic compounds

1990-05-15

1992-03-03

Richter, Johann

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

548328, C07D23972, C07D23974

Patent

active

050934953

ABSTRACT:
Novel hydroxy-benzoheterocyclic-substituted 3-oxopentane derivatives are produced by reaction of a hydroxy-containing ortho-phenylene amine compound and the source of a five-carbon keto-containing moiety selected from 4-oxoheptanedioic acid compounds or 1,6-dioxa[4,4]spirodilactones. The derivatives produced from hydroxy-phenylenediamines are further reacted to produce compounds of higher cyclic functionality. The products are bisphenols which are precursors of thermoplastic and thermoset polymers of high melting point or glass transition temperature which are useful in high temperature applications.

REFERENCES:
patent: 4957923 (1990-09-01), Young et al.

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