Process for the preparation of alkyl 4-methyl-3-formyl-penten-1-

Details Process for the preparation of alkyl 4-methyl-3-formyl-penten-1- Process for the preparation of alkyl 4-methyl-3-formyl-penten-1-

1983-04-21

1984-12-11

Trousof, Natalie

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

Organic compounds

Carboxylic acid esters

549302, 549313, 560168, 560226, 562577, 564250, 564277, 564279, C07C 6973

Patent

active

044879571

ABSTRACT:
A novel alkyl 4-methyl-3-formyl-penten-1-oate of the formula ##STR1## wherein R is alkyl of 1 to 5 carbon atoms and the dotted lines represent a double bond in the 3,4 or 4,5-position and their preparation and novel intermediates therefore and a novel process for the preparation of 4-methyl-3-formyl-pent-3-en-1-oic acid which is an intermediate for the preparation of compounds of the formula ##STR2## wherein R.sub.3 is selected from the group consisting of hydrogen and the residue of an alcohol R.sub.3 OH by the process of European Patent Application Ser. No. 0023849 published Feb. 11, 1981, which are used to prepare very active insecticidal esters.

REFERENCES:
Lowry, T. H. and Richardson, K. S., Mechanism and Theory in Organic Chemistry , Harper and Row, New York, (1976), pp. 456-457.
House, H. O., Modern Synthetic Reactions, 2nd ed., W. A. Benjamin, Inc., Menlo Park, Calif., (1972), p. 492.

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