Diisopropylethylamine → diethyl 2-(N-(4-(6,8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinolin-4-yl)phenyl)sulfamoylamino)ethylphosphonate

Participants

Reaction Conditions

Reaction Steps

Into a 50-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed diethyl 2-(chlorosulfonylamino)ethylphosphonate (intermediate 30.8) (670 mg, 2.40 mmol, 1.47 equiv), 4-(6,8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinolin-4-yl)benzenamine (intermediate 30.7) (500 mg, 1.63 mmol, 1.00 equiv), N-ethyl-N-isopropylpropan-2-amine (400 mg, 3.10 mmol, 1.91 equiv) in acetonitrile (20 mL). The resulting solution was stirred for 3 h at 60° C. The resulting mixture was concentrated under vacuum and the residue was applied to a silica gel column and eluted with dichloromethane/methanol (20:1). This resulted in 150 mg (16%) of the title compound as a light yellow solid.

Provenance & Evidence