Process for the preparation of alkylated cyclopentenones

Details Process for the preparation of alkylated cyclopentenones Process for the preparation of alkylated cyclopentenones

1983-11-16

1985-02-12

Reamer, James H.

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

Organic compounds

Carboxylic acid esters

560261, 560113, 568356, C07C 4548, C07C 69145

Patent

active

044992971

ABSTRACT:
Cyclopentenones of formula ##STR1## wherein each of symbols R.sup.1 and R.sup.2, when taken separately, represents an alkyl radical of C.sub.1 to C.sub.6, or a hydrogen atom, or, when taken together, they represent a polymethylene, or one of them designates a hydrogen atom and the other an alkyl radical of C.sub.1 to C.sub.6, are prepared starting from compounds having formula ##STR2## wherein R stands for a C.sub.1 to C.sub.6 alkyl radical or a phenyl group, via a catalytic reaction promoted by a metallo-organic compound of formula

REFERENCES:
patent: 2870208 (1959-01-01), Guex et al.
patent: 4317905 (1982-03-01), Wassardo et al.
Golden et al., J. Chem. Soc., Chem. Comm., 1981, pp. 1030-1031.
Funk et al., Synthesis, 1980, p. 118.
Naef et al., Helv. Chim. Acta., vol. 61, p. 2524 (1978).
Ho et al., Chem. Ind., 1982, pp. 371-372.
McCurry et al., J. Org. Chem., vol. 39, pp. 2317-2319 (1974).
Grieco et al., J.A.C.S., vol. 102, p. 7587 (1980).

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