Thioglycolic Acid → rac-4-(1-(4-fluorophenyl)-6-methyl-1H-indazol-5-yl)-1-methyl-3-(pyridin-2-yl)-6,8-dihydro-1H-pyrazolo[3,4-e][1,4]thiazepin-7(4H)-one

Participants

Reaction Conditions

Reaction Steps

A reaction vial was charged with 1-methyl-3-(pyridin-2-yl)-1H-pyrazol-5-amine (0.07 g, 0.39 mmol, Example #2, step B), 1-(4-fluorophenyl)-6-methyl-1H-indazole-5-carbaldehyde (0.10 g, 0.39 mmol) and water (0.4 mL). The mixture was stirred for about 1 min then 2-mercaptoacetic acid (0.03 mL, 0.39 mmol) was added and the vial was sealed and warmed in a preheated bath to about 110° C. After stirring for 30 min, 2-mercaptoacetic acid (0.014 mL, 0.20 mmol) was added and continued heating for about 90 min. The vial was cooled to ambient temperature and the water was decanted. The solid was sonicated in Et2O (30 mL) and collected by vacuum filtration. The solid was then rinsed with heptane (30 mL) then dissolve in DCM and purified by column chromatography (EtOAc/heptane 100:0 to 0:100) to afford rac-4-(1-(4-fluorophenyl)-6-methyl-1H-indazol-5-yl)-1-methyl-3-(pyridin-2-yl)-6,8-dihydro-1H-pyrazolo[3,4-e][1,4]thiazepin-7(4H)-one (0.06 g, 0.12 mmol, 29%). LC-MS (Table 1, Method g) Rt=2.32 min, m/z 485 (M+H)+. 1H NMR (DMSO-d6, 400 MHz) δ 10.11 (s, 1H), 8.36-8.30 (m, 1H), 8.10 (s, 1H), 7.79-7.69 (m, 3H), 7.64-7.60 (m, 1H), 7.54 (s, 1H), 7.40-7.36 (m, 2H), 7.27 (s, 1H), 7.12-7.04 (m, 1H), 6.74 (s, 1H), 3.90 (s, 3H), 3.42-3.38 (m, 1H), 3.18-3.14 (m, 1H), 2.70 (s, 3H).

Provenance & Evidence