Process for preparing cyclopentenolones

Details Process for preparing cyclopentenolones Process for preparing cyclopentenolones

1980-11-28

1985-04-09

Reamer, James H.

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

Organic compounds

Oxygen containing

568322, 568341, 568361, C07C 4559

Patent

active

045103291

ABSTRACT:
A process for preparing cyclopentenolones of the formula ##STR1## wherein R.sub.1 is an alkyl group having not more than 6 carbon atoms, an alkenyl or alkynyl group having not more than 6 carbon atoms or a group of the formula: ##STR2## in which 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: 3932511 (1976-01-01), Muller
patent: 3981920 (1976-09-01), Buchi
Piancatelli, G. et al., Tetrahedron, vol. 34, (1978), pp. 2775-2778.
Scettri et al., Tetrahedron, vol. 35, pp. 135-138, (1979).
Piancatelli et al., Tetrahedron, vol. 36, pp. 661-663, (1980).
Floyd, J. Org. Chem., 43, pp. 1641-1643, 1978.
Seebach et al., Angew Chem., 89, pp. 334-335, 1977.
Piancatelli et al., Tetrahedron Letters, 13, pp. 1131-1134, 1977.
Stork et al., J. Am. Chem. Soc., 97, pp. 3258-3260, 1975.
Piancatelli et al., Synthesis, pp. 116-117, 1976.
Piancatelli et al., Tetrahedron Letters, 39, pp. 3555-3558, 1976.

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