Hydrochloric Acid → 1-(2-(2,5-Dichlorophenoxy)-5-nitrophenylsulfonyl)piperazine

Participants

Reaction Steps

To a solution of compound 39 (0.100 g, 0.19 mmol) in DCM (6.00 mL) was added 1N HCl in 1,4-dioxane (0.570 mL). The reaction was monitored with TLC (25% EtOAc in hexanes, Rt=0.0). The reaction was complete after stirring at room temperature for 16 hrs, as indicated by the absence of the starting material). The reaction mixture was concentrated and the residual was redissolved in MeOH (2.00 mL). Et2O (4.00 mL) was then added and the mixture was stirred until precipitate formed (10 min). The solid was collected by filtration to yield compound 40 as a white solid (0.080 g, 100% HPLC purity, 83% yield). 1H NMR (500 MHz, DMSO-d6): δ 9.39 (s, 2H), 8.61 (d, J=2 Hz, 1H), 8.45 (dd, J1=3 Hz, J2=9 Hz, 1H), 7.78 (d, J=9 Hz, 1H), 7.73 (d, J=2 Hz, 1H), 7.53 (dd, J1=2 Hz, J2=8 Hz, 1H), 7.12 (d, J=8 Hz, 1H), 3.57 (m, 4H), 3.16 (m, 4H).

Provenance & Evidence