C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/468.8
C07C 125/065 (1980.01)
Patent
CA 1152524
ABSTRACT OF THE DISCLOSURE This invention is directed to a process for preparing carbamates from an organic carbonate and an aromatic amine in the presence of a catalyst. The reaction is conducted at a temperature of at least 200°C and the catalyst is at least one member selected from the group consisting of (1) zinc or divalent tin salts of monocarboxylic acids having a pKa value of less than 2.8 other than such salts of trifluoroacetic acid; (2) divalent cobalt or trivalent cobalt salts of monocarboxylic acids having a pKa value of less that 2.8; (3) zinc or divalent tin or divalent cobalt or trivalent cobalt salts of organic materials having more than one -COOH group per molecule; (4) divalent cobalt or trivalent cobalt salts of a 1,3-diketone having from 5 to 10 carbon atoms; (5) tetravalent alkyl tin compounds or tetravalent alkyl tin oxides represented by formulas I and II: SnRyX4-y I and Image II wherein each R is independently a hydrocarbon group having from 1 to 10 carbon atoms, or a carboxylate group having from 2 to 10 carbon atoms, X is a halogen atom, x has an average value of from 1 to 5, and y has a value of from 1 to 4; and (6) an inorganic zinc compound selected from zinc carbonate, zinc sulfide, and zinc oxide.
377729
Smart & Biggar
The Dow Chemical Company
LandOfFree
Preparation of carbamates from aromatic amines and organic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of carbamates from aromatic amines and organic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of carbamates from aromatic amines and organic... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-796325