Production of isocyanate compounds

Details Production of isocyanate compounds Production of isocyanate compounds

C - Chemistry, Metallurgy

07

C

260/537.1

C07C 265/06 (2006.01)

Patent

CA 1250860

-1- Abstract: The invention relates to the production of an alkenoyl isocyanate of the formula: Image wherein R is a hydrogen atom or a lower alkyl group, by reacting an acrylamide of the formula: Image wherein R is as defined above with an oxalyl halide of the formula: (COX)2 wherein X is a halogen atom to give a reaction mixture comprising a haloalkanoyl isocyanate of the formula: Image wherein R and X are each as defined above with or with- out the alkenoyl isocyanate, recovering the haloalkanoyl isocyanate and, when present, the alkenoyl isocyanate separately from the reaction mixture and reacting the recovered haloalkanoyl isocyanate with a hydrogen halide- eliminating agent to give the alkenoyl isocyanate,

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