Process for the production of isocyanates

Details Process for the production of isocyanates Process for the production of isocyanates

1987-10-08

1988-05-17

Siegel, Alan

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

Organic compounds

Carboxylic acid esters

560129, 560138, 560139, 560141, 560142, 560144, 560145, 560336, C07C 6900, C07C 7100

Patent

active

047452129

ABSTRACT:
Isocyanates containing ester and/or amide groups are produced by reacting (a) an isocyanatocarboxylic acid chloride with (b) an organic compound containing a silylated alcoholic group and/or silylated phenolic hydroxyl group and/or silylated amino group which compound contains no other group which is reactive with isocyanate and chlorocarbonyl groups under the reaction conditions. The reaction of (a) with (b) is carried out at a temperature of from -20.degree. to 150.degree. C. This process makes it possible to produce the desired isocyanates with a high degree of selectivity.

REFERENCES:
Yoshio Iwakura, et al, Journal of Organic Chemistry, vol. 31, 1966, pp. 142-146.
M. Lalonde, T. H. Chan, Use of Organosilicon Reagents as Protected Groups in Organic Synthesis, CA 104:168509, pp. 817-845.

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