Pyridine → 2,2-Dimethyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylic acid-3-(phenoxy)-alpha-vinylbenzyl ester

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Reaction Steps

3.2 g of pyridine in 10 ml of benzene is added dropwise at 5° C. to a solution of 8 g of 3-phenoxy-α-vinyl-benzyl alcohol in 30 ml of benzene, and at 10° C. is subsequently added 8 g of 2,2-dimethyl-3-(dichlorovinyl)-cyclopropanecarboxylic acid chloride. The reaction mixture is stirred for two hours at room temperature and is then allowed to stand for 12 hours. In further processing, the reaction mixture is diluted with ice water, the organic phase is extracted 3 times with 100 ml of 3% HCl solution each time and 3 times with 100 ml of 3% sodium bicarbonate solution each time; it is dried over sodium sulfate, and the benzene is distilled off. There is obtained the compound of the formula ##STR7## as colourless oil have a refractive index of nD40 =1.5710. (isomeric mixture 40% cis and 60% trans compound)

Provenance & Evidence