Preparation of carbamates

Details Preparation of carbamates Preparation of carbamates

B - Operations, Transporting

01

J

260/468.8

B01J 31/28 (2006.01)

Patent

CA 1229343

A B S T R A C T PREPARATION OF CARBAMATES Process for the preparation of carbamates and/or derivatives thereof by reacting an organic compound containing at least one hydroxyl group with carbon monoxide and an organic nitrogenous compound in the presence of a catalytic system based on palladium and a ligand according to the general formula: Image (I) wherein L = N, P, As, or Sb; R, R1, R and R3 are (un)substituted alkyl, aryl, alkaryl or aralkyl or R and R1 and/or R2 and R3 may form a ring together with the atom L to which they are attached; R4 and R5 are H or lower alkyl and n = 2, 3 or 4, whereas carbon atoms between the groups L may be part non-cyclic or non-cyclic un- saturated structures, optionally in the presence of an acid.

415935

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