反应详情

温度

-40 °C

To a toluene solution of dimethylzinc (150 mL, 2.0M, 0.30 mol) at -78° C. is added a CH2Cl2 solution of titanium tetrachloride (150 mL, 1.0 M, 0.15 mol) and after stirring for 30 min 4-trifluoromethyl-α,α-dimethylbenzyl chloride (83.3 g, 0.373 mol) in CH2Cl2 (100 mL) is added dropwise over 20 min. After the addition is complete the reaction is allowed to warm to -40° C. over 1.5 h. After an additional 2 h at -40° C. the brown reaction mixture is carefully poured onto crushed ice, extracted with CH2 Cl2 (2×500 mL), the combined extracts dried over MgSO4 and concentrated to give 4-trifluoromethyl-t-butylbenzene; yield: 60.3 g (80%). Anal. Calcd. for C11H13F3 : C, 65.32; H, 6.48. Found: C, 65.11; H, 6.38.

1. additionis added dropwise over 20 min
2. additionAfter the addition
3. additionAfter an additional 2 h at -40° C. the brown reaction mixture is carefully poured
4. customonto crushed ice
5. extractionextracted with CH2 Cl2 (2×500 mL)
6. dry with materialthe combined extracts dried over MgSO4
7. concentrationconcentrated