Preparation of glyoxal monoacetals

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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C07C 4564

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060138424

ABSTRACT:
A process for preparing glyoxal monoacetals of the formula I, ##STR1## where R.sup.1 and R.sup.2, which can be identical or different, are C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkenyl involves reacting a mixture of glyoxal and glyoxal bisacetals of the formula II, ##STR2## where R.sup.1 and R.sup.2 have the meaning given above, with an excess of an alcohol of the formula R.sup.1 OH or R.sup.2 OH or mixtures of these in the presence of an acid catalyst until reaction equilibrium is achieved.

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Bull. Soc. Chim. 1, 95 (1988).
Synth. Comm., 18(12), 1343-1348 (1988).
J. Org. Chem. vol. 38, No. 3, 1973, 556.
J. Org. Chem. Soc. 77, 1284 (1955).

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