Triacetoxyperiodinane → 5-(4,5-Dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-2-yl)-1-isopropyl-1H-[1,2,4]triazole-3-carbaldehyde

HRID 1498393Notes

Reaction equation

HRID 1498393 reaction equation
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

Participants

4

Reactant 2

HCID 159087TriacetoxyperiodinaneHCID 58204744(5-(9-bromo-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-2-yl)-1-isopropyl-1H-1,2,4-triazol-3-yl)methanol

Product 1

HCID 582047025-(4,5-Dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-2-yl)-1-isopropyl-1H-[1,2,4]triazole-3-carbaldehyde

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

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 (1H, 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)

Workup

  1. customThe reaction was quenched by the addition of sodium thiosulphate (620 mg in 1 mL water) before the addition of further water
  2. extractionextracted twice with DCM
  3. washThe combined organic extracts were washed with water
  4. dry with materialthen dried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-c208684c98854b98a448274a6b84fdb4
Source dataset
uspto-grants-2015_12
Patent number
US09198918B2

Reaction notes

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