Cinnamoylbenzene → Dihydrochalcone

Participants

Reaction Steps

According to the general procedure, a solution of chalcone (50 mg, 0.24 mmol) and rac-32 (7.4 mg, 0.0047 mmol, 2.0 mol %) in CH2Cl2 (3 mL) was pressurized with H2 to 62 bar and stirred for 96 h. Filtration of the reaction mixture and evaporation of the solvent gave 41 as a colorless solid (50 mg, 99%). mp 69-70° C. (lit.2 70-72° C.); 1H NMR27 (300 MHz, CDCl3): δ 7.98 (d, 2H, J=7.2 Hz), 7.6-7.2 (m, 8H), 3.33 (t, 2H, J=7.8 Hz), 3.10 (t, 2H, J=7.2 Hz); 13C NMR (75.5 MHz, CDCl3): δ 199.3, 141.4, 136.9, 133.2, 128.7, 128.6, 128.5, 128.1, 126.2, 40.5, 30.2.

Provenance & Evidence