反应详情

3.2 g of pyridine in 10 ml of benzene is added dropwise at 5° C., with stirring, to 8 g of 3-phenoxy-α-vinyl-benzyl alcohol in 30 ml of benzene. After the addition of 14 g of 2,2-dimethyl-3-(1-bromo-2,2-dichloro-2-bromoethyl)-cyclopropanecarboxylic acid chloride at 10° C., the mixture is stirred for 2 hours at room temperature, and is allowed to stand for a further 10 hours at this temperature. The reaction mixture is diluted with ice water; the organic layer is extracted three times with 100 ml of 3% HCl each time, and subsequently three times with 100 ml of 3% sodium bicarbonate each time; the organic phase is dried with sodium sulfate, and the benzene is distilled off. There is obtained the compound of the formula ##STR9## as colourless oil having a refractive index of nD40° =1.5776. In an analogous manner is also obtained the compound of the formula ##STR10##

1. waitto stand for a further 10 hours at this temperature
2. extractionthe organic layer is extracted three times with 100 ml of 3% HCl each time, and subsequently three times with 100 ml of 3% sodium bicarbonate each time
3. dry with materialthe organic phase is dried with sodium sulfate
4. distillationthe benzene is distilled off
5. customThere is obtained the compound of the formula ##STR9## as colourless oil
6. customIn an analogous manner is also obtained the compound of the formula