Halophenylethylenes

Details Halophenylethylenes Halophenylethylenes

1988-12-20

1990-02-06

Evans, J. E.

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

Organic compounds

Halogen containing

568809, 570142, C07C 1724, C07C 2118, C07C 3324

Patent

active

048989975

ABSTRACT:
These compounds have the general formula: ##STR1## wherein R and R.sup.1, which may be the same or different, are hydrogen or alkyl, preferably C.sub.1 -C.sub.4 alkyl, and X, Y and Z are each independently hydrogen, chlorine or fluorine, provided that when R, R.sup.1 and Z are hydrogen, X and Y are not both hydrogen or both fluorine, and are prepared by dehydrating an alcohol of the formula: ##STR2## by, for example, heating the alcohol in the presence of a catalytic amount of a strong acid such as p-toluenesulphonic acid and preferably in the presence of an inert solvent.
The compounds are intermediate for the preparation of fungicidal compounds.

REFERENCES:
patent: 4414210 (1983-11-01), Miller et al.
patent: 4551469 (1985-11-01), Parry et al.
Dalton, David R. Ved P. Dutta and Daniel C. Jones "Bromohydrin Formation in Dimethyl Sulfoxide", J. Am. Chem. Soc. 90:20/Sep. 25, 1968.

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