Dimethylformamide → 8-cyano-2-isopropyl-2H-1,2,4-triazol-3-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

HRID 84673Notes

Reaction equation

HRID 84673 reaction equation
Br[C:2]1[CH:23]=[CH:22][C:5]2[C:6]3[N:7]=[C:8]([C:14]4[N:15]([CH:19]([CH3:21])[CH3:20])[N:16]=[CH:17][N:18]=4)[S:9][C:10]=3[CH2:11][CH2:12][O:13][C:4]=2[CH:3]=1.[CH3:24][N:25](C)C=O>C(Cl)Cl.[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:24]([C:2]1[CH:23]=[CH:22][C:5]2[C:6]3[N:7]=[C:8]([C:14]4[N:15]([CH:19]([CH3:21])[CH3:20])[N:16]=[CH:17][N:18]=4)[S:9][C:10]=3[CH2:11][CH2:12][O:13][C:4]=2[CH:3]=1)#[N:25]

Participants

6

Reactant 2

HCID 6228DimethylformamideHCID 668867488-Bromo-2-isopropyl-2H-1,2,4-triazol-3-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

Product 1

HCID 668867648-cyano-2-isopropyl-2H-1,2,4-triazol-3-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azuleneYield 71.3%

Reagents, catalysts & solvents 3

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 6344DichloromethaneSolvent

Procedure

8-Bromo-2-isopropyl-2H-1,2,4-triazol-3-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene (330 mg, 0.84 mmol) and degassed dimethylformamide (4.2 mL) were added to a CEM microwave vial. The mixture was thoroughly purged with nitrogen. Zinc cyanide (99.0 mg, 0.84 mmol, 1.0 equiv.) and Pd(PPh3)4 (48.7 mg, 0.04 mmol, 0.05 equiv.) were added to the reaction mixture in one portion and the vial was sealed immediately. The reaction was submitted to MW irradiation at 60 W for 15 minutes (T=175° C.). The mixture was diluted with methylene chloride, filtered through celite, and washed with saturated NH4Cl. The organic layers were combined, dried with MgSO4 and concentrated. The crude mixture was loaded onto silica gel and purified by flash chromatography (0-100% EtOAc in hexanes) to give 202 mg (71.3% yield) of 8-cyano-2-isopropyl-2H-1,2,4-triazol-3-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene a yellow solid.

Workup

  1. additionwere added to a CEM microwave vial
  2. customThe mixture was thoroughly purged with nitrogen
  3. customthe vial was sealed immediately
  4. customThe reaction was submitted to MW irradiation at 60 W for 15 minutes (T=175° C.)
  5. filtrationfiltered through celite
  6. washwashed with saturated NH4Cl
  7. dry with materialdried with MgSO4
  8. concentrationconcentrated
  9. custompurified by flash chromatography (0-100% EtOAc in hexanes)

Sources & evidence

ORD record
ord-1741b546cecc4640a0a3188512ddea02
Source dataset
uspto-grants-2014_09
Patent number
US08846762B2

Reaction notes

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