Process for preparing isocyanic acid derivatives

Details Process for preparing isocyanic acid derivatives Process for preparing isocyanic acid derivatives

1976-05-14

1977-11-22

Torrence, Dolph H.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

260 47R, 260 775NC, 560229, 560 88, 560196, 260296C, 2603477, 260453P, 260463, 2604654, 260465D, 560226, 560227, 544222, 526291, 526293, 526294, 260545R, C07C11800

Patent

active

040596109

ABSTRACT:
Isocyanic acid derivatives are prepared by reacting an organic halogen compound with an alkali cyanate in N,N-disubstituted organic acid amides, N,N-disubstituted sulfonic acid amides, sulfoxides, sulfones or macrocyclic polyethers, at 70.degree. to 200.degree. C, in the presence of organic polyhalogen compounds selected from compounds having dihalogenomethyl group, dihalogenomethylene group, or trihalogenomethyl group and tetrahalogenomethane, in an amount in the range of from 1 to 20 weight percent based on the weight of said organic halogen compounds.

REFERENCES:
patent: 3440270 (1969-04-01), McMaster et al.
patent: 3920644 (1975-11-01), Randa et al.

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