Cesium carbonate → HCID 117843369, compound

Participants

Reaction Conditions

Reaction Steps

Intermediate 2.06 (30.3 mg, 0.103 mmol), Pd-PEPPSI-IPr precatalyst (7.1 mg, 0.010 mmol), 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazole (34 mg, 0.13 mmol), and Cs2CO3 (102 mg, 0.313 mmol) were taken up in DME (1.15 mL) under Ar. Water (0.57 mL) was added and the resulting mixture was heated to 100° C. After 2.5 h, additional Pd-PEPPSI-IPr precatalyst (7.4 mg, 0.011 mmol), 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazole (34 mg, 0.13 mmol), and Cs2CO3 (100 mg, 0.31 mmol) were added, and the mixture was stirred for an additional 16 h. The reaction mixture was diluted with EtOAc (20 mL) and water (20 mL) and the phases were separated. The aqueous phase was extracted with EtOAc and the combine organic phase was dried over Na2SO4, filtered, and concentrated to afford a crude residue that was purified by silica gel chromatography to provide (R)-4-((R)-1-(6-(benzo[d]thiazol-4-yl)-3-methyl-3H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one 3.22. LCMS-ESI+ (m/z): [M+H]+ calcd for C20H20N5O2S: 394.1; found 394.2. 1H NMR (400 MHz, Chloroform-d) δ 9.07 (s, 1H), 8.68 (s, 1H), 8.20 (dd, J=7.6, 1.2 Hz, 1H), 7.96 (dd, J=8.0, 1.2 Hz, 1H), 7.88 (s, 1H), 7.59-7.49 (m, 1H), 5.84-5.73 (m, 2H), 4.04 (s, 3H), 3.63-3.53 (m, 1H), 3.41 (dd, J=9.7, 6.1 Hz, 1H), 3.02-2.86 (m, 1H), 2.58-2.52 (m, 2H), 1.51 (d, J=6.2 Hz, 3H).

Provenance & Evidence