Chlorotrimethylsilane → HCID 178505940, compound

Participants

Reaction Steps

Under a nitrogen stream, zinc powder (18.8 kg, 287 mol) was suspended in tetrahydrofuran (130 L), 1,2-dibromoethane (470 g, 2.50 mol) was added at 60° C., and the mixture was stirred at the same temperature for 30 min. Trimethylsilyl chloride (560 g, 3.10 mol) was added to this suspension at room temperature, and the mixture was stirred with heating for 30 min. A solution of 3-chloro-2-fluorobenzyl bromide (54.0 kg, 242 mol) in tetrahydrofuran (65 L) was added dropwise at 0° C., and the mixture was stirred at 20° C. for 3 hr. The remaining zinc was filtered off to give a solution of 1M 3-chloro-2-fluorobenzylzinc bromide in tetrahydrofuran. This was used in the next main step.

Provenance & Evidence