Process for preparing cyclopentenones

Details Process for preparing cyclopentenones Process for preparing cyclopentenones

1995-12-01

1998-06-09

Geist, Gary

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

Organic compounds

Oxygen containing

C07C 49105

Patent

active

057636648

ABSTRACT:
A process for preparing a cyclopentenone by forming a two-phase mixture of a 1,4-diketone, a water immiscible organic solvent, and an aqueous base solution, and heating the mixture so as to convert the 1,4-diketone to a cyclopentenone which collects in the organic solvent phase.

REFERENCES:
patent: 3907896 (1975-09-01), Calame
patent: 4384144 (1983-05-01), Shono et al.
patent: 4413145 (1983-11-01), Piancatelli et al.
patent: 5026919 (1991-06-01), Dessau
patent: 5276199 (1994-01-01), Lee
Rosini, G., et al., "A New Route to 1,4-Diketones and its Application to (Z)-Jasmone and Dihydrojasmone Synthesis", Tetrahedron vol. 39, No. 24, pp. 4127-4132 (1983).
Acheson, R. M., et al., "Experiments Bearing on the Synthesis of Cortisone, Part I,* Some Cyclopentenone Derivatives", J. Chem. Soc., pp. 1127-1133--1133 (1952).

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