Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1992-12-04
1993-08-31
Chan, Nicky
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549434, 549504, 558 61, 558140, 560226, 562603, 570258, 570261, 570206, C07D30902, C07C 5245
Patent
active
052410862
ABSTRACT:
A process for the preparation of a brominated compound which comprises the step of reacting at least one compound selected from the group consisting of a chloroformate, a chlorosulfite and a chlorophosphite with a brominating agent for a time sufficient to obtain at least one brominated compound. In particular, an alcohol is converted into a chloroformate, chlorosulfite or a chlorophosphite, which is then brominated to obtain the desired product. In another embodiment, a brominating agent is reacted with a reactant selected from the group consisting of thionyl chloride, phosgene and phosphorous oxychloride, followed by contacting the reaction product obtained with an alcohol to be brominated.
REFERENCES:
patent: 3130222 (1964-04-01), Asadorian et al.
Jean-Manuel MAS et al., "A New Simple and Industrial PRocess for Bromination of Alcohols", Synthetic Comunications, 22 (15) 2187-2191 (1992).
CA:97(14)114572W, Chem. Eng. News, vol. 60, No. 28, p. 5, 1982, "Caution With Thionyl Chloride".
Mas Jean-Manuel
Metivier Pascal
Chan Nicky
Rhone-Poulenc Chimie
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