Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol

Details Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol

1978-03-28

1980-02-26

Mars, Howard T.

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

Organic compounds

Oxygen containing

C07C 3310

Patent

active

041907302

ABSTRACT:
A 1,1,1-trihalogeno-4-methyl-3-penten-2-ol is prepared by thermally isomerizing 1,1,1-trihalogeno-4-methyl-4-penten-2-ol. The isomerization reaction may be catalyzed by an acid or a transition metal of Group 6B, 7B or 8 of the Periodic Table of Elements, or a compound thereof. The 1,1,1-trihalogeno-4-methyl-3-penten-2-ol thus prepared is useful as a synergist for herbicides or a physiologically active compound, and, additionally, is useful as a starting material for the synthesis of 2,2-dimethyl-3-(2',2'-dihalogenovinyl)-cyclopropane carboxylic esters which are active ingredients of insecticides.

REFERENCES:
Klimova et al., J. Org. Chem., USSR, (1969), pp. 1308-1311.
Yanovskaya, Russian Chemical Reviews, vol. 39, 10, 1970, pp. 859-874.
March, Adv. Org. Chem., Reactions Mechanism & Structure, McGraw Hill Book Co., New York, (1968), pp. 452-454.
Ipatieff et al., J.A.C.S., 56, pp. 2696-2698, 1934.
Colonge et al., Soc. Chim. de France, Bull, 1957, pp. 204-208.

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