Process for preparing cyclopentenolones

Details Process for preparing cyclopentenolones Process for preparing cyclopentenolones

1981-11-23

1983-08-09

Reamer, James H.

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

Organic compounds

Oxygen containing

568361, C07C 4559

Patent

active

043980430

ABSTRACT:
A process for preparing cyclopentenolones of the formula: ##STR1## wherein R.sub.1 is a straight, branched or cyclic alkyl group having not more than 6 carbon atoms, a straight, branched or cyclic alkenyl group having not more than 6 carbon atoms, a straight or branched alkynyl group having not more than 6 carbon atoms or a group of the formula: ##STR2## wherein R.sub.2 is a hydrogen atom, a methyl group or a halogen atom directly from the corresponding furan-carbinols of the formula: ##STR3## wherein R.sub.1 is as defined above in a single step with an excellent yield, characterized in that the furan-carbinols are treated with water in the presence or absence of a catalyst.

REFERENCES:
patent: 3932510 (1976-01-01), Muller
patent: 3981920 (1976-09-01), Buchi
Scettri et al., Tetrahedron, vol. 35, pp. 135-138, (1979).
Piancatelli et al., Tetrahedron, 34, pp. 2775-2778, (1978).
Piancatelli et al., Tetrahedron Letters No. 39, pp. 3555-3558, (1976).

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