Trimethyl borate → HCID 23437316, compound

Participants

Reaction Conditions

Reaction Steps

1,4-Difluoro-2,3-dihexyloxybenzene (11.2 g, 0.036 mol) was stirred, under nitrogen, in anhydrous tetrahydrofuran (150 ml). The reaction mixture was cooled to −78° C. and then butyl lithium (1.6M in hexanes, 24.38 ml, 0.039 mol) was added via cannular over one hour. Stirring was continued at −78° C. for 2 hours. This temperature was maintained whilst a solution of trimethylborate (4.05 g, 0.039 mol) in dry tetrahydrofuran (100 ml) was added drop-wise. The cooling bath was then removed and the reaction was stirred overnight at room temperature. Addition of HCl (1M, 36 ml) dissolved the white suspension and a yellow solution was formed. Extraction was performed with toluene (2×100 ml), the combined organics extracts were then washed with water (2×50 ml), dried with magnesium sulphate. Removal of the drying agent by filtration and the solvent in vacuo yielded a brown oil containing the crude product (11.95 g, 93%). The product was used in the next step without further purification.

Provenance & Evidence