反应详情

3.4 g (20 mmol) of fluoropentyl bromide was dripped into a mixture of 0.5 g of magnesium (21 mmol) and 50 ml of THF to obtain a Grignard's reagent. This solution was then dripped into a 50 ml THF solution of 6.5 g (20 mmol) of 4'-(4-chloro-4-silacyclohexyl)-3,4-difluorobiphenyl to obtain 4'-(trans-4-(4-fluorobutyl)-4-silacyclohexyl)-3,4-difluorobiphenyl. The silacyclohexane rings of this product were a mixture of trans isomers and cis isomers. They were separated by means of chromatography to obtain 6.3 g of the trans isomers (yield 74%).

1. customto obtain a Grignard's reagent