Preparation of 2-halocyclobutanones

Details Preparation of 2-halocyclobutanones Preparation of 2-halocyclobutanones

1976-03-01

1977-12-20

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603452, 26034622, 560124, 260514G, 260514H, 260586F, 260590C, 260590FB, C07C 4500, C07C 4502

Patent

active

040641740

ABSTRACT:
The preparation of a 2-halocyclobutanone by contacting a 2,2-dihaloalkanoyl halide with an ethylenically unsaturated compound at a temperature of at least 5.degree. C in the presence of dispersed zinc or tin and certain alkanones is conducted by using a molar ratio of zinc (or tin) to 2,2-dihaloalkanoyl halide below 1.00, with the zinc (or tin) in the form of particles having a largest dimension of up to 0.05 mm, and adopting a temperature of up to 55.degree. C.

REFERENCES:
patent: 3129248 (1964-04-01), England
patent: 3189608 (1965-06-01), Martin
patent: 3288854 (1966-11-01), Martin
patent: 3390185 (1968-06-01), Martin
patent: 3646150 (1972-02-01), Hall et al.
patent: 4028418 (1977-06-01), VAN DEN Brink et al.
Ghosey, "Tetra Lett", vol. 27, pp. 615-633 (1971).
Ghosey, "Tetra Lett", vol. 22, pp. 135-139 (1966).
Brady, "Synthesis", pp. 415-422, (1971).
Brady, "J. Org. Chem.", vol. 31, pp. 626-628, (1966).
Stevens, "J.A.C.S.", vol. 87, pp. 5257-5259, (1965).

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