Glycolic Acid → (6-Phenyl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methanol

HRID 40178

Reaction equation

HRID 40178 reaction equation
[C:1]1([C:7]2[N:12]=[N:11][C:10]([NH:13][NH2:14])=[CH:9][CH:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:15](O)(=O)[CH2:16][OH:17].CC1C=CC(S(O)(=O)=O)=CC=1.O>C1(C)C=CC=CC=1>[C:1]1([C:7]2[CH:8]=[CH:9][C:10]3[N:11]([C:15]([CH2:16][OH:17])=[N:14][N:13]=3)[N:12]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

5

Reactant 3

HCID 757Glycolic AcidHCID 521998p-Toluenesulfonic acid monohydrateHCID 64098423-Hydrazinyl-6-phenylpyridazine

Product 1

HCID 57812703(6-Phenyl-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methanol

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of 1-(6-phenylpyridazin-3-yl)hydrazine (2.00 g, 10.7 mmol), glycolic acid (0.825 g, 10.8 mmol), p-TsOH.H2O (2.55 g, 13.4 mmol) in PhMe (50 mL) was refluxed for 14 h. PhMe was removed in vacuo. The resulting solids were diluted with water (30 mL). The mixture was brought to pH˜10 with 2N NaOH. The solids were isolated solid by filtration, washed with water and dried under vacuum to give an off white solid which was used without further purification. (ESI, pos. ion) m/z: 227.0 (M+H).

Workup

  1. temperaturewas refluxed for 14 h
  2. customPhMe was removed in vacuo
  3. additionThe resulting solids were diluted with water (30 mL)
  4. customThe solids were isolated solid
  5. filtrationby filtration
  6. washwashed with water
  7. customdried under vacuum
  8. customto give an off white solid which
  9. customwas used without further purification

Sources & evidence

ORD record
ord-6989f4bd20934af588a402f67981da7d
Source dataset
uspto-grants-2013_09
Patent number
US08524900B2

Linked notes

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