Manufacture of symmetrical or unsymmetrical monoacetals of aroma

Details Manufacture of symmetrical or unsymmetrical monoacetals of aroma Manufacture of symmetrical or unsymmetrical monoacetals of aroma

1980-07-30

1981-09-01

Trousof, Natalie

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

Organic compounds

Sulfur containing

568315, C07C 4156

Patent

active

042873673

ABSTRACT:
Monoacetals of aromatic 1,2-diketones are manufactured by reacting the corresponding 1,2-diketones, in an organic solvent, with an acid ester (R.sup.1).sub.n X as alkylating agent and an alcoholate (R.sup.2 O).sub.m Me, where R.sup.1 and R.sup.2 are identical or different hydrocarbon radicals of 1 to 12 carbon atoms, which may or may not be substituted, n and m are integers from 1 to 3, X is a monobasic, dibasic or tribasic acid radical and Me is a metal of main groups 1 to 3 of the periodic table of the elements. The resulting diketone monoacetals are particularly suitable for use as photoinitiators in photopolymerizable compositions.

REFERENCES:
patent: 3715293 (1973-02-01), Sandner
patent: 4190602 (1980-02-01), Brunisholz et al.
Kuhn, Chem. Ber., vol. 94, pp. 2258-2263, (1961).
Schmitz, Chem. Ber., vol. 91, pp. 410-414, (1958).

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