Method for producing 2-cyclopentenones

Details Method for producing 2-cyclopentenones Method for producing 2-cyclopentenones

1984-04-02

1985-09-10

Reamer, James H.

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

Organic compounds

Oxygen containing

568310, C07C 4567

Patent

active

045408254

ABSTRACT:
A method for producing 2-cyclopentenones represented by the formula, ##STR1## wherein R represents an alkyl, alkenyl, cycloalkyl, substituted or non-substituted aryl or aralkyl group, which comprises heating 4-cyclopentenones represented by the formula, ##STR2## wherein R has the same meaning as above, in the presence of 1,8-diaza-bicyclo[5,4,0]undecene or its organic acid salt.
The 2-cyclopentenones are useful as an intermediate for perfumes, medicines and agricultural chemicals.

REFERENCES:
patent: 4329508 (1982-05-01), Ho et al.
patent: 4347386 (1982-08-01), Saito et al.
patent: 4371711 (1983-02-01), Saito et al.
Fieser et al., "Reagents for Organic Synthesis, vol. 4, pp. 17-19, (1978).

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