Methanesulfonamide → (R)-1-(3-Chlorophenyl)-2-hydroxypentan-1-one

Participants

Reaction Steps

Compound 10k was synthesized by a procedure similar to that described for (R)-10a using (Z)-tert-butyl(1-(3-chlorophenyl)pent-1-enyloxy)dimethylsilane (9k, 4.1 g, 0.013 mol), AD-mix-β (18.5 g), and CH3SO2NH2 (1.3 g, 0.014 mol) in tert-butyl alcohol-water (50 mL:50 mL). The reaction was quenched with sodium sulfite (13.2 g). After purification, 2.4 g (77%) of the desired product was isolated: [α]20D +33.3° (c 1.1, CHCl3); 1H NMR (CDCl3) δ 7.91-7.87 (m, 1H), 7.80-7.75 (m, 1H), 7.63-7.17 (m, 1H), 7.45 (t, 1H, J=7.6 Hz), 5.08-5.00 (m, 1H), 3.58 (d, 1H, J=6.5 Hz), 1.89-1.75 (m, 1H), 1.61-1.35 (m, 3H), 0.93 (t, 3H, J=7.2 Hz); 13C NMR (CDCl3) δ 201.1, 135.4, 133.8, 130.2, 128.6, 126.5, 73.2, 37.8, 18.2, 13.8. C11H13ClO2.

Provenance & Evidence