Cesium carbonate → HCID 90404695, compound

Participants

Reaction Steps

760 mg of 5-((4-((6-(2,2,2-trifluoroethyl)thieno[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)methyl)-1H-indole-2-carbonitrile hydrochloride (1.5 mmol) and 207 mg of bromoacetamide (1.5 mmol) were dissolved in 3.6 mL of dry DMF. 1.96 g of cesium carbonate (6 mmol) was added and reaction mixture was stirred for 4 hs. Then it was quenched with 50 mL of water and extracted with DCM-MeOH 10:1. Combined organic extracts were evaporated with silica gel and loaded on column. The product was eluted with DCM-MeOH 10:1 mixture. After evaporation of product containing fractions it was recrystallized from MeOH to produce 319 mg of 2-(2-cyano-5-((4-((6-(2,2,2-trifluoroethyl)thieno[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)methyl)-1H-indol-1-yl)acetamide, which was converted to hydrochloride salt by dissolving in 5 mL of MeOH, adding of 1 eq of 1M HCl in water. Hydrochloride salt can be recrystallized further from MeOH. Monohydrochloride salt exists as a mixture of rotomers in approximate ratio 10:1, NMR is described for the major one: 1H NMR (600 MHz, MeOD-d4): 8.44 (s, 1H), 7.91 (s, 1H), 7.57 (m, 2H), 7.41 (s, 1H), 5.10 (s, 2H), 4.53 (m, 1H), 4.47 (s, 1H), 3.89 (q, 2H, J=10.3 Hz), 3.62 (m, 2H), 3.24 (m, 2H), 2.35 (m, 2H), 1.93 (m, 2H). 13C NMR (150 MHz, MeOD-d4): δC 171.07, 157.66, 153.62, 140.17, 130.77, 129.55, 127.95, 127.10, 125.64, 123.46, 121.90, 118.31, 114.76, 113.69, 113.52, 112.60, 61.96, 52.67, 49.60, 47.98, 47.40, 35.52 (q, J=33 Hz), 29.96. ESI MS [MH+]: 528.1783.

Provenance & Evidence