Hydrochloric Acid → HCID 22461963, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 1,2-difluorobenzene 1 (20.0 g, 0.175 mol) in dry THF (300 ml) was added dropwise a solution of 2.5 M n-butyllithium (68 ml, 0.17 mol) at −70° C. under dry nitrogen. The addition rate was such that the temperature did not rise above −60° C. After the addition was completed the reaction was stirred at −70° C. for 2 h. 1,2-Epoxyoctane (21.6 g, 0.169 mol) was added slowly followed by the dropwise addition of boron trifluoride etherate (21 ml, 0.17 mol). The mixture was allowed to warm to room temperature overnight, acidified with 10% hydrochloric acid and extracted into ether. The combined extracts were washed with sat. aqueous sodium chloride and evaporated to give a viscous liquid. Kugelrohr distillation (130° C., 0.15 mm Hg) yielded 1-(2,3-difluorophenyl)-octan-2-ol (30.8 g, 74%) which crystallised on standing; Vmax 3370 br (OH), 2950, 2920, 2850, 1620, 1590, 1480 s, 1280, 1205, 1070 br, 825, 775, and 730 cm−1, δH 0.88 (3 H, t, Me), 1.23-1.40 (10H, m, CH2), 1.40-1.58 (4 H, m overlapping br s, CH2CHOH and OH), 2.72 (1 H, ddd, J16, 8 and 2 Hz, ArCH2), 2.91 (1 H, ddd, J16, 6, and 2 Hz, ArCH2), 3.86 (1 H, m, CHOH), and 6.94-7.09 (3 H, m, ArH); m/z 242 (M+), 225, 198, 157, 139, 128, and 97.

Provenance & Evidence