Process for aryl-quinone and aryl-naphthoquinone diazide sulfoni

Details Process for aryl-quinone and aryl-naphthoquinone diazide sulfoni Process for aryl-quinone and aryl-naphthoquinone diazide sulfoni

1987-03-24

1990-06-05

Higel, Floyd D.

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

Organic compounds

Diazooxide or diazotate

531556, 531565, C07C11300

Patent

active

049315498

ABSTRACT:
A process for the preparation of aryl-diazide-sulfonic acids by a series of sequential in-situ process steps. The process comprises the nitrosation of a hydroxyarylsulfonic acid; conversion of the nitroso-derivative to a sulfamate which is then diazotized to the diazide. Temperature and pH are maintained in predetermined ranges to maintain the reaction products in solution without the formation side-products or the need to isolate intermediates.
The process of the invention is particularly useful in the preparation of light-sensitive materials such as naphthoquinonediazide sulfonic acids which are used in the preparation of photoresist compositions. The invention provides a high purity product at a high material efficiency, high equipment utilization, low effluent discharge, and reduced cost.

REFERENCES:
patent: 737967 (1903-09-01), Schmidt
patent: 2812321 (1957-11-01), Eberhart et al.
patent: 2861064 (1958-11-01), Suckfull et al.
Bartos, et al, Chemical Abstracts, vol. 95, #6911f (1981).

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