Preparation of 4-monoacetals of 2-methylbut-2-ene-1,4-dial

Details Preparation of 4-monoacetals of 2-methylbut-2-ene-1,4-dial Preparation of 4-monoacetals of 2-methylbut-2-ene-1,4-dial

1987-01-16

1989-02-14

Lone, Werren B.

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

Organic compounds

Oxygen containing

568590, C07C 4330

Patent

active

048047864

ABSTRACT:
4-Monoacetals of (E)-2-methylbut-2-ene-1,4-dial of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each an aliphatic hydrocarbon radical of 1 to 12 carbon atoms, cycloalkyl of 5 to 7 carbon atoms or benzyl, or R.sup.1 and R.sup.2 together form an ethylene or propylene radical which may furthermore be substituted by lower alkyl, are prepared by a process in which a compound of the general formula II ##STR2## where either R.sup.3 and R.sup.4 are both one of the groups ##STR3## where R.sup.1 and R.sup.2 have the above meanings, or R.sup.3 is one of the groups ##STR4## and R.sup.4 is formyl ##STR5## is reacted, at from 20.degree. to 200.degree. C., in the presence of an acidic compound, with the compound of the formula III

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patent: 3978092 (1976-08-01), Ichikawa et al.
patent: 4256643 (1981-03-01), Jaedicke et al.
patent: 4579979 (1986-04-01), Andrade et al.

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