Process for the preparation of sterically hindered hydroxphenylc

Details Process for the preparation of sterically hindered hydroxphenylc Process for the preparation of sterically hindered hydroxphenylc

1983-07-05

1985-08-20

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

560 67, C07C 6988, C07C 6976

Patent

active

045365938

ABSTRACT:
If the transesterification of esters of the formula ##STR1## with alcohols of the formula III A--(OH).sub.m is catalyzed by successive treatment with catalytic amounts (a) of a tin compound of a metal of the fourth main group or the fourth sub-group of the periodic system and (b) of an acid earth, compounds of the formula I ##STR2## are obtained in virtually quantitative yield. The products thus obtained contain no troublesome by-products and do not have to be additionally purified.
R is methyl or ethyl, A is a radical derived from an m-hydric aliphatic alcohol, n is 0 to 2, and m is 1 to 4.

REFERENCES:
patent: 3330859 (1967-07-01), Dexter et al.
patent: 3779945 (1973-12-01), Dexter et al.
patent: 4417071 (1983-11-01), Rosenberger
CA, 67, 89140q (1967).

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