Preparation of alkyl-substituted cinnamaldehydes

Details Preparation of alkyl-substituted cinnamaldehydes Preparation of alkyl-substituted cinnamaldehydes

1989-08-31

1991-02-26

Lone, Werren B.

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

Organic compounds

Oxygen containing

568450, C07C 4500

Patent

active

049963651

ABSTRACT:
Alkyl-substituted cinnamaldehydes of the formula I ##STR1## where one or more of R.sup.1 , R.sup.2 and R.sup.3 is alkyl of from 1 to 8 carbon atoms, preferably of from 1 to 4 carbon atoms, and non-alkyl R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, which comprises heating acetylene alcohols of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are each as defined above, in the presence of from 55 to 98% strength aqueous formic acid.

REFERENCES:
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patent: 4749814 (1988-06-01), Chabardes
Chemical Abstract-10-Organic Chemistry 1951; p. 8997g.
Annales De Chimie 1967, pp. 243-249, Michel Barrelle, et al.
J. Amer. Chem. Soc. (1948) 70, p. 3953.
Houben-Weyl, Methoden der Organischen Chemie, Georg Thieme-Verlap, Stuttgart, New York, Band 6/lb, p. 959.
Houben-Weyl, band 7/1, p. 110 (1954).
J. Org. Chem. USSR, vol. 19, pp. 715-721 (1983).
Houben-Weyl, Methoden der Organischen Chemie, Georg Thyieme-Verlag, Stuttgart, vol. 7/1, p. 109 (1954).

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