Process for the preparation of diphenylmethane mono and dicarbam

Details Process for the preparation of diphenylmethane mono and dicarbam Process for the preparation of diphenylmethane mono and dicarbam

1978-05-15

1979-03-27

Thomas, Jr., James O.

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

Organic compounds

Carboxylic acid esters

560 27, 260453P, C07C12504

Patent

active

041467272

ABSTRACT:
Diphenylmethane mono and dicarbamates and polymethylene polyphenyl carbamate homologs and derivatives of these compounds are produced by the protonic or Lewis acid catalyzed rearrangement of an (alkoxycarbonyl)phenylaminomethylphenyl compound having the general formula ##STR1## INCLUDING THE HIGHER HOMOLOGS OF SUCH COMPOUNDS, WHEREIN X, Y AND Z, WHICH ARE DIFFERENT ON THE RING, ARE AN ALKYL GROUP HAVING FROM 1 TO 3 CARBON ATOMS, AN --NHCOOR, --CH.sub.2 ArNHCOOR or --N(COOR)CH.sub.2 Ar group; x, y and z may also be at least one hydrogen; R is a 1 to 3 carbon alkyl group and Ar is phenyl which may be substituted with a 1 to 3 carbon atom alkyl group.

REFERENCES:
patent: 2946768 (1960-07-01), Klauke et al.
patent: 3919279 (1975-11-01), Rosenthal et al.
patent: 3956360 (1976-05-01), Zajacek et al.
Clark, "Chem. Absts.", vol. 57, 13627, 1962.

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