Diisopropylethylamine → (R)-4-(4-oxo-4,5-dihydro-thiazolo[4,5-d]pyridazin-2-yl)-1-(4-trifluoromethyl-benzenesulfonyl)-piperazine-2-carboxylic acid 4-trifluoromethoxy-benzylamide

Participants

Reaction Steps

To a mixture of the compound (87 mg) obtained in Example 983, Step 2 and the compound (32 mg) obtained in Step 5 in isopropanol (0.9 ml) was added N,N-diisopropylethylamine (30 μl) at room temperature. After stirring overnight at room temperature, and the mixture was stirred with heating under reflux for 5 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by thin layer silica gel chromatography (methanol:chloroform=5:95) to give the title compound (84 mg).

Provenance & Evidence