Diisopropylethylamine → 2-(2-Isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-9-(1-isopropylpiperidin-4-ylsulfanyl)-8-methyl-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulene

Participants

Reaction Conditions

Reaction Steps

A mixture of 9-bromo-2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-8-methyl-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulene (146 mg, 0.363 mmol), 1-isopropylpiperidine-4-thiol (87 mg, 0.545 mmol), Pd2(dba)3 (17 mg, 5 mol %), XantPhos (21 mg, 10 mol %) and DIPEA (254 μl, 1.45 mmol) in dioxane (4 mL) was purged with nitrogen and then heated at 120° C. for 2 h using microwave irradiation. The reaction mixture was then diluted with DCM (80 mL) and purified by column chromatography (Si-PCC, gradient 0-8% 2M NH3/MeOH in DCM) followed by (C18, gradient 20-55% MeOH in 0.5% TFA/H2O). The product containing fractions were combined and concentrated in vacuo. The resulting residue was loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 0.5M NH3/MeOH. The basic fractions were concentrated under reduced pressure affording 2-(2-Isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-9-(1-isopropylpiperidin-4-ylsulfanyl)-8-methyl-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulene as a colorless solid (112 mg, 64%). LCMS: RT 2.23 and 2.28 min [M+H]+ 480.9

Provenance & Evidence