Diisopropylethylamine → (R)-4-(7-chloro-5-cyclopropyl-thiazolo[4,5-d]pyrimidin-2-yl)-1-(4-trifluoromethyl-benzenesulfonyl)-piperazine-2-carboxylic acid 3-fluoro-4-trifluoromethoxy-benzylamide

Participants

Reaction Steps

To a mixture of the crude product (about 0.095 mmol) obtained in Step 5 and 2,7-dichloro-5-cyclopropyl-thiazolo[4,5-d]pyrimidine (24 mg) in chloroform (1.0 ml) was added N,N-diisopropylethylamine (42 μl) at room temperature. After stirring at room temperature for 2 hr, the reaction mixture was concentrated under reduced pressure, and the residue was purified by thin layer silica gel chromatography (methanol:chloroform=1:10) to give the title compound (52 mg). 1H-NMR (CDCl3, 300 MHz) δ: 1.03-1.09 (2H, m), 1.17-1.22 (2H, m), 2.18-2.27 (1H, m), 3.14-3.35 (2H, m), 3.43-3.53 (1H, m), 3.96 (1H, d, J=13.6 Hz), 4.22-4.36 (2H, m), 4.45-4.69 (3H, m), 6.97-7.06 (3H, m), 7.20 (1H, t, J=8.5 Hz), 7.83 (2H, d, J=8.3 Hz), 8.02 (2H, d, J=8.3 Hz).

Provenance & Evidence