Preparation of n-aryl amines from isocyanates

Details Preparation of n-aryl amines from isocyanates Preparation of n-aryl amines from isocyanates

1988-03-29

1991-08-20

Ivy, C. Warren

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

Organic compounds

Amino nitrogen containing

C07E20900

Patent

active

050416707

ABSTRACT:
Methods of producing N-phenyl amines comprise reacting a phenyl-containing isocyanate with HR, and a boron complexing agent in an aprotic solvent, wherein R, is --OH or --COOH (i.e., water or formic acid), neutralizing the resulting N-aryl amide to N-aryl amine and recovering the N-aryl amine.

REFERENCES:
patent: 4078002 (1978-03-01), Brown
patent: 4160784 (1979-07-01), Sugasawa et al.
Brown et al., "Selective Reductions. XXI. 9-Borabicyclo[3.3.1] nonane in Tetrahydrofuran as a New Selective Reducing Agent in Organic Synthesis, Reaction with Selected Organic Compounds Containing Representative Functional Groups", Journal of Organic Chemistry, vol. 41, No. 10, pp. 1778-1791 (1976).
R. G. Arnold et al., Recent Advances in Isocyanate Chemistry, pp. 47, 51 and 116 (1956).

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