Diisopropylethylamine → 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-[(2-ethyl-2H-tetrazol-5-yl)methyl]-6-(5-fluoro-2-methoxyphenyl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione

Participants

Reaction Steps

1-[(2-ethyl-2H-tetrazol-5-yl)methyl]-6-(5-fluoro-2-methoxyphenyl)-3-(piperidin-4-yl)thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione hydrochloride (190 mg; compound B79) is reacted with 4-[(4aR,10bR)-9-ethoxy-8-methoxy-3,4,4a,10b-tetrahydro-1H-thiopyrano[4,3-c]isoquinolin-6-yl]benzoic acid (145 mg; compound C10) and HBTU (304 mg) in DCM/DMF (15 ml/2 ml) in the presence of DIPEA (377 mg) according to the procedure described in example 2 to afford the title compound after purification by flash column chromatography [amino phase silica gel, eluation gradient: Cyclohexane/EtOAc/DCM, 100/0/0 to 50/40/10 to 30/60/10 to 0/90/10 (v/v/v)] and twice by preparative TLC [20×20 cm TLC plates with 0.5 mm thickness, eluation gradient: EtOAc/methanol/triethylamine, 91/5/4 (v/v/v)] as a solid.

Provenance & Evidence