Process for preparing 2-isocyanatoalkyl esters of organic carbox

Details Process for preparing 2-isocyanatoalkyl esters of organic carbox Process for preparing 2-isocyanatoalkyl esters of organic carbox

1977-06-15

1981-07-14

Trousof, Natalie

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

Organic compounds

Carboxylic acid esters

560266, C07C 6718

Patent

active

042788099

ABSTRACT:
2-Isocyanatoalkyl esters of organic carboxylic acids are prepared by reacting (a) an aqueous solution of a 2-oxazoline with (b) an organic solution of phosgene dissolved in a water-immiscible organic solvent in the presence of (c) a hydrochloric acid acceptor. As an example, 2-isocyanatoethyl methacrylate was prepared by concurrently blending an aqueous stream of 2-isopropenyl-2-oxazoline, a methylene chloride stream of phosgene and an aqueous stream of sodium hydroxide at a temperature of from about 0.degree. C. to about 10.degree. C. The reaction rate is very high and the reaction is essentially complete upon blending the reactants.

REFERENCES:
patent: 3535332 (1970-10-01), Runge et al.
Seelinger, W. et al. "Recent Synthesis and Reactions of Cyclic Imidic Esters." Angew. Chem., Internat. Ed. vol. 5. No. 10 (1966) at p. 882.

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