Triacetoxyperiodinane → 5-(4,5-Dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-2-yl)-1-isopropyl-1H-[1,2,4]triazole-3-carbaldehyde
反応式
Br[C:2]1[CH:25]=[CH:24][C:5]2[C:6]3[N:10]([CH2:11][CH2:12][O:13][C:4]=2[CH:3]=1)[CH:9]=[C:8]([C:14]1[N:18]([CH:19]([CH3:21])[CH3:20])[N:17]=[C:16]([CH2:22][OH:23])[N:15]=1)[N:7]=3.CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O>C(Cl)Cl>[N:7]1[C:8]([C:14]2[N:18]([CH:19]([CH3:20])[CH3:21])[N:17]=[C:16]([CH:22]=[O:23])[N:15]=2)=[CH:9][N:10]2[C:6]=1[C:5]1[CH:24]=[CH:25][CH:2]=[CH:3][C:4]=1[O:13][CH2:12][CH2:11]2参加物
4
反応物 2
生成物 1
試薬・触媒・溶媒 1
実験手順
A suspension of [5-(8-bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-2-yl)-1-isopropyl-1H-[1,2,4]triazol-3-yl]-methanol 315 (166 mg, 0.51 mmol) in DCM (5 mL) was treated with Dess-Martin periodinane (DMP, 238 mg, 0.56 mmol) and resultant solution stirred at RT for 2 h under an atmosphere of nitrogen. The reaction was quenched by the addition of sodium thiosulphate (620 mg in 1 mL water) before the addition of further water and extracted twice with DCM. The combined organic extracts were washed with water then dried (Na2SO4), filtered and concentrated in vacuo to give 5-(4,5-Dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-2-yl)-1-isopropyl-1H-[1,2,4]triazole-3-carbaldehyde as a cream solid (170 mg, quantitative). LCMS: RT=4.30 min, [M+H]+324. 1H NMR 400 MHz (DMSO-d6) δ: 9.91 (1 H, s), 8.43 (1 H, dd, J=8.06, 1.78 Hz), 8.11 (1 H, s), 7.34-7.34 (1 H, m), 7.17-7.17 (1 H, m), 7.07 (1 H, dd, J=8.17, 1.23 Hz), 6.03 (1 H, m), 4.57-4.48 (4 H, m), 1.55 (6 H, d, J=6.60 Hz)