Hydrochloric Acid → 9-[1-(2-Hydroxy-ethyl)-1H-pyrazol-4-yl]-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (2-hydroxy-ethyl)-isopropyl-amide

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Reaction Steps

9-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (2-hydroxy-ethyl)-isopropyl-amide (57 mg, 0.138 mmol), 1-(2-(tetrahydro-2H-pyran-2yloxy)ethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (67 mg, 0.208 mmol), Tetrakis(triphenylphosphine)palladium(0) (16 mg, 0.0138 mmol), 1.5 mL 1 M potassium acetate in water, and 1.5 mL acetonitrile were combined in a microwave vial and placed on the CEM microwave for 20 minutes at 140° C. Complete reaction by LCMS. Diluted reaction with 2 M HCl and extracted product with ethyl acetate. Some of the THP group fell off during work-up. The final Intermediate was in the ethyl acetate layer, which was dried over magnesium sulfate and concentrated in vacuo. Flash purified 0 to 10% MeOH in dichloromethane and again concentrated in vacuo. The THP intermediate was deprotected with 1 M HCl in dioxane (5 mL0 over 72 hours). Complete deprotection by LCMS. Concentrated in vacuo and purified by HPLC to give 277 (3.8 mg, 6% yield, M+1 443.1)

Provenance & Evidence