Preparation of alpha, beta-unsaturated ketones

Details Preparation of alpha, beta-unsaturated ketones Preparation of alpha, beta-unsaturated ketones

1987-09-25

1989-12-05

Reamer, James H.

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

Organic compounds

Oxygen containing

568315, 568346, 568347, 568392, 568388, C07C 4566

Patent

active

048853950

ABSTRACT:
Alpha,beta-unsaturated ketones of the formula (I) ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, alkyl, alkenyl of 1 to 12 carbon atoms, cycloalkyl, aryl, aralkyl or alkylaryl, are prepared by converting the corresponding .alpha.-hydroxy, alkoxy or carboxy compound in the presence of an acidic catalyst.
Preferred starting materials are 3-methyl-3-hydroxy-butan-2-one, 3-methyl-3-hydroxypentan-2-one and 3-pentamethylene-3-hydroxypropan-2-one, and preferred catalysts are zeolites of the pentasil type.

REFERENCES:
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patent: 2827490 (1958-03-01), Martin
patent: 3259658 (1966-07-01), Mercier
patent: 3422148 (1969-01-01), Wollner et al.
patent: 3890392 (1975-06-01), Ember
patent: 4512961 (1985-04-01), Scherzer et al.
Houben-Weyl, Methoden Der Organischen Chemie, vol. V11/2c, (1977), pp. 2115-2116.
Beilsteins Handuch Der Organischen Chemie, vol. 1, III. 3, (1959), p. 2987, lines 37-40.
Patent Abstract of Japan, 61-5038, vol. 10, No. 144 (C-349), (2201), (1986).

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