Process for the preparation of cyclic ketones

Details Process for the preparation of cyclic ketones Process for the preparation of cyclic ketones

1991-04-19

1992-06-23

Reamer, James H.

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

Organic compounds

Oxygen containing

568393, C07C 4574

Patent

active

051244861

ABSTRACT:
The invention provides a process for the preparation of cyclic ketones of the general formula ##STR1## in which R represents an optionally substituted alkyl or cycloalkyl group and R.sup.1 and R.sup.2 independently represent an optionally substituted alkyl, cycloalkyl or aryl group, which comprises heating a compound of the general formula ##STR2## in which X represents a chlorine or bromine atom and R is as defined above, with a compound of the general formula ##STR3## in which R.sup.1 and R.sup.2 are as defined above, in the presence of an organic acid.
Certain cyclic ketones of formula (I) are useful as intermediates in the preparation of certain fungicidally active cyclopentane derivatives.

REFERENCES:
patent: 2194704 (1940-03-01), Kroeger
patent: 3962148 (1976-06-01), Hochstetler et al.
patent: 4169859 (1979-10-01), Clough
patent: 4266066 (1981-05-01), Spielmann et al.
Fukuzawa et al., J. Chem. Soc., Perk Trans 1, pp. 1473-1477 (1987).

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