反应详情

Magnesium powder (34.7 g, 1.446 mol) was charged under argon into a three-necked flask followed by the addition of a portion of a solution of 2-(4-ethylbenzyl)-4-bromo-1-chlorobenzene (122.5 g, 0.398 mol) in anhydrous tetrahydrofuran (0.4 L) and 1,2-dibromoethane (2.89 g, 1.34 mL, 0.015 mol). The mixture was heated to reflux and after reaction initiation (exothermic and consuming magnesium), the rest of the solution of 2-(4-ethylbenzyl)-4-bromo-1-chlorobenzene (245.0 g, 0.796 mol) in anhydrous tetrahydrofuran (0.81 L) was added dropwise. The mixture was then allowed to react for another 1 h under gentle reflux until most of the magnesium was consumed.

1. temperatureThe mixture was heated
2. temperatureto reflux
3. customto react for another 1 h
4. customwas consumed