1-Methyl-1H-pyrazole-4-carbaldehyde → HCID 178480441, compound

HRID 1486573Notes

Reaction equation

HRID 1486573 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([NH:9][C:10]2[N:14]=[C:13]([NH2:15])[NH:12][N:11]=2)[CH:5]=[C:6]([Cl:8])[CH:7]=1.[CH3:16][N:17]1[CH:21]=[C:20]([CH:22]=O)[CH:19]=[N:18]1.[BH4-].[Na+]>CO>[Cl:1][C:2]1[CH:3]=[C:4]([NH:9][C:10]2[N:14]=[C:13]([NH:15][CH2:22][C:20]3[CH:19]=[N:18][N:17]([CH3:16])[CH:21]=3)[NH:12][N:11]=2)[CH:5]=[C:6]([Cl:8])[CH:7]=1

Participants

5

Reactant 3

HCID 5731171-Methyl-1H-pyrazole-4-carbaldehydeHCID 4311764Sodium borohydrideHCID 727146143-Amino-5-(3,5-dichloroanilino)-s-triazole

Product 1

HCID 178480441HCID 178480441, compoundYield 69%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
-20 °C

Procedure

A solution of N3-(3,5-dichlorophenyl)-1H-1,2,4-triazole-3,5-diamine Intermediate 2 (70 mg, 287 μmol) and 1-methyl-1H-pyrazole-4-carbaldehyde (108.9 mg, 982 μmol) in MeOH (3 ml) was stirred at 45° C. for 4 days to give a suspension, cooled to −20° C. and was filtered to collect the solid. The solid was re-suspended in MeOH (5 ml), NaBH4 (65.1 mg, 1.72 mmol) was added and the reaction was stirred for 1 hour. The solvent was removed, and the reaction mixture was redissolved in EtOAc (5 ml) and washed with water (2×4 ml), dried over MgSO4 and concentrated in vacuo. Crystallization from DCM/hexanes afforded a white solid as desired product (66.6 mg, 69% yield). MS +m/z: 338 (M+H)+

Workup

  1. customto give a suspension
  2. filtrationwas filtered
  3. customto collect the solid
  4. customThe solvent was removed
  5. dissolutionthe reaction mixture was redissolved in EtOAc (5 ml)
  6. washwashed with water (2×4 ml)
  7. dry with materialdried over MgSO4
  8. concentrationconcentrated in vacuo
  9. customCrystallization from DCM/hexanes

Sources & evidence

ORD record
ord-044746ee756b4e3bb27fde69b49c4fd6
Source dataset
uspto-grants-2016_08
Patent number
US09428469B2

Reaction notes

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