1-(Ethoxycarbonylmethyl)-1H-pyrazole-4-boronic acid pinacol ester → (4-{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]azulen-8-yl}-pyrazol-1-yl)-acetic acid

Participants

Reaction Steps

Following the procedure for 114, 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 was reacted with [4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyrazol-1-yl]-acetic acid ethyl ester to give 152. MS(ESI+) 477.0. 1H NMR (400 MHz, DMSO) δ 13.61-12.69 (br, 1H), 8.31-8.26 (m, 2H), 8.25 (s, 1H), 7.99 (s, 1H), 7.44 (dd, J=8.3, 1.6, 1H), 7.31 (d, J=1.5, 1H), 5.86 (q, J=8.7, 2H), 4.95 (s, 2H), 4.40 (t, J=4.9, 2H), 3.47 (t, J=4.9, 2H)

Provenance & Evidence