alpha-Chlorohydrin, (+)- → 3-[4-((S)-2,3-dihydroxy-propoxy)-3,5-dimethyl-phenyl]-1-(5-ethyl-4-phenyl-thiophen-2-yl)-propan-1-one

Participants

Reaction Conditions

Reaction Steps

A solution of 3-(4-hydroxy-3,5-dimethyl-phenyl)-1-(5-ethyl-4-phenyl-thiophen-2-yl)-propan-1-one (52 mg, 0.143 mmol) in 2-propanol (1 mL) and 3 N aq. NaOH (0.3 mL) is treated with (S)-3-chloro-propane-1,2-diol (79 mg, 0.71 mmol) and the mixture is stirred at 70° C. for 15 h. The reaction mixture is diluted with water and extracted with DCM. The solvent of the organic extract is evaporated and the crude product is purified on prep. TLC plates with heptane:EA 1:3 to give 3-[4-((S)-2,3-dihydroxy-propoxy)-3,5-dimethyl-phenyl]-1-(5-ethyl-4-phenyl-thiophen-2-yl)-propan-1-one (14 mg) as a colourless resin; LC-MS: tR=1.03 min, [M+1]+=439.25; 1H NMR (CDCl3): δ 7.58 (s, 1H), 7.45-7.30 (m, 5H), 6.88 (s, 2H), 4.11-4.04 (m, 1H), 3.87-3.80 (m, 4H), 3.67-3.60 (m, 2H), 3.60-3.56 (m, 1H), 3.48-3.40 (m, 1H), 3.20-3.10 (m, 2H), 2.98-2.87 (m, 4H), 2.25 (s, 6H), 1.30 (t, J=7.6 Hz, 3H).

Provenance & Evidence