Potassium Carbonate → 8-[1-(2-chloro-ethyl)-1H-pyrazol-4-yl]-2-[2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

Participants

Reaction Steps

To a solution of the 8-Bromo-2-[2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene from Example 51 (2.00 g, 34.75 mmol) and 1-(2-chloroethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole in 8 mL of acetonitrile was added 7 mL of 2M of potassium carbonate in water followed by the addition of tetrakis(triphenylphosphine)palladium(0) (0.55 G, 0.476 mmol). This reaction mixture was heated on a Biotage microwave at 140 C for 10 minutes. The cooled reaction mixture was diluted with EtOAc, filtered to remove a black ppt, then washed with water×1, saline×1, then dried over Na2SO4, concentrated and purified by MPLC on a 12 gram silica column, eluting with 10-80% EtOAc/heptanes to give 8-[1-(2-chloro-ethyl)-1H-pyrazol-4-yl]-2-[2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene (1.6 g) as a yellow powder.

Provenance & Evidence