2-Methylpropan-2-olate → 1-{2-[2-(2,4-Difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1-thia-10-aza-benzo[e]azulen-9-yl}-piperidin-4-ol

Participants

Reaction Conditions

Reaction Steps

A mixture of 9-Chloro-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1-thia-10-aza-benzo[e]azulene (300 mg, 0.72 mmol), Pd(OAc)2 (49 mg, 0.3 mmol), 4-Tri-methylsilanyloxy-piperidine (186 mg, 1.44 mmol), 2,8,9-tributyl-2,5,8,9-tetraaza-1-phosphabicyclo[3.3.3]undecane (99 mg, 0.29 mmol), tert-butoxide (140 mg, 1.44 mmol) in dioxane (2 mL) was bubbled N2 for 10 min and then stirred at 120° C. for 6 min under the irradition of microwave. The mixture was filtered over ceilite. The filtrate was concentrated to dryness and purified by pre-HPLC to afford 130 mg of 124 (yield=38%). 1H NMR (MeOD, 400 MHz): δ8.11 (s, 1H), 7.68-7.66 (m, 1H), 7.33-7.23 (m, 3H), 7.10-7.08 (m, 1H), 6.54-6.52 (m, 1H), 4.16-4.13 (m, 2H), 3.90-3.86 (m, 2H), 3.76-3.72 (m, 2H), 3.07-3.04 (m, 2H), 2.95-2.89 (m, 2H), 1.86-1.82 (m, 2H), 1.44-1.41 (m, 2H). LC-MS (ESI): m/z=482 [M+H]+

Provenance & Evidence