1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 3-[1-({4-[(4aR,10bR)-9-ethoxy-8-methoxy-3,4,4a,10b-tetrahydro-1H-thiopyrano[4,3-c]isoquinolin-6-yl]phenyl}carbonyl)piperidin-4-yl]-1-[(1-ethyl-1H-pyrazol-4-yl)methyl]-6-phenylthieno[3,2-d]pyrimidine-2,4(1H,3H)-dione

Participants

Reaction Steps

To a suspension of 1-[(1-ethyl-1H-pyrazol-4-yl)methyl]-6-phenyl-3-(piperidin-4-yl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione hydrochloride (300 mg; compound B42), 4-[(4aR,10bR)-9-ethoxy-8-methoxy-3,4,4a,10b-tetrahydro-1H-thiopyrano[4,3-c]isoquinolin-6-yl]benzoic acid (253 mg; compound C10), EDCI (122 mg) and HOBT hydrate (86 mg) in DCM (10 ml) DIPEA (0.28 ml) is added. After 45 min additional 4-[(4aR,10bR)-9-ethoxy-8-methoxy-3,4,4a,10b-tetrahydro-1H-thiopyrano[4,3-c]isoquinolin-6-yl]benzoic acid (126 mg; compound C10) is added and the reaction mixture is stirred for 14 h at RT. Water and aqueous potassium hydrogen sulfate solution (10% w/w) are added and the mixture is extracted with DCM. The combined organic layers are dried (sodium sulfate) and concentrated under reduced pressure. The residue is purified by flash column chromatography [silica gel, eluation gradient: DCM/MeOH, 1/0 to 1/1 (v/v)] and preparative HPLC to afford the title compound as a solid.

Provenance & Evidence