Diisopropylethylamine → HCID 67258943, compound

Participants

Reaction Steps

To a suspension of 1-[(5-ethylthiophen-2-yl)methyl]-6-phenyl-3-(piperidin-4-yl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione hydrochloride (198 mg, compound B95) 4-[(4aR,10bR)-9-ethoxy-8-methoxy-3,4,4a,10b-tetrahydro-1H-thiopyrano[4,3-c]isoquinolin-6-yl]benzoic acid (159 mg; compound C10) and HBTU (167 mg) in DCM (4.0 ml) is added DIPEA (0.28 ml). The reaction mixture is stirred at RT for 1 h. Saturated aqueous sodium bicarbonate solution (2 ml) is added and the mixture is filtered using a phase separator. The organic layer is concentrated under reduced pressure and the residue is purified twice by flash column chromatography [amino phase silica gel, eluent: EtOAC] to yield the title compound as a solid.

Provenance & Evidence