Sodium Nitrite → (6-phenyl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl-1H-[1,2,3]triazolo[4,5-c]pyridine

HRID 1511273Notes

Reaction equation

HRID 1511273 reaction equation
[C:1]1([C:7]2[CH:8]=[CH:9][C:10]3[N:11]([C:13]([CH2:16][NH:17][C:18]4[CH:23]=[CH:22][N:21]=[CH:20][C:19]=4[NH2:24])=[N:14][N:15]=3)[N:12]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[N:25]([O-])=O.[Na+]>CC(O)=O.O>[C:1]1([C:7]2[CH:8]=[CH:9][C:10]3[N:11]([C:13]([CH2:16][N:17]4[C:18]5[CH:23]=[CH:22][N:21]=[CH:20][C:19]=5[N:24]=[N:25]4)=[N:14][N:15]=3)[N:12]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

5

Reactant 2

HCID 23668193Sodium NitriteHCID 67503473N4-((6-phenyl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl)pyridine-3,4-diamine

Product 1

HCID 57690935(6-phenyl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl-1H-[1,2,3]triazolo[4,5-c]pyridine

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 962WaterSolvent

Procedure

To a solution of N4-((6-phenyl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl)pyridine-3,4-diamine (0.0640 g, 0.202 mmol) in HOAc (5 mL) was added sodium nitrite (0.0153 g, 0.222 mmol) in water (2 mL). Stirred for 1 h. Concentrated. Took up in DMSO and purified on RPHPLC. Took fractions containing product and made basic with 91 sodium carbonate and removed volatiles in vacuo. Product crashed out and was isolated by filtration. MS m/z=329.2[M+1]+. Calc'd for C17H12N8: 328.3.

Workup

  1. concentrationConcentrated
  2. custompurified on RPHPLC
  3. additionTook fractions containing product
  4. customremoved volatiles in vacuo
  5. customwas isolated by filtration

Sources & evidence

ORD record
ord-e0fa9c7c04de480db4ea259fa3106b61
Source dataset
uspto-grants-2012_07
Patent number
US08212041B2

Reaction notes

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