HCID 20303004, compound → HCID 20302962, compound

HRID 1732879Notes

Reaction equation

HRID 1732879 reaction equation
[N:1]1([C:6]2[N:7]=[N+:8]([O-])[C:9]3[CH:15]=[C:14]([Cl:16])[CH:13]=[CH:12][C:10]=3[N:11]=2)[CH:5]=[CH:4][CH:3]=[N:2]1>C(O)C.[Ni]>[N:1]1([C:6]2[N:7]=[N:8][C:9]3[CH:15]=[C:14]([Cl:16])[CH:13]=[CH:12][C:10]=3[N:11]=2)[CH:5]=[CH:4][CH:3]=[N:2]1

Participants

4

Reactant 1

HCID 20303004HCID 20303004, compound

Product 1

HCID 20302962HCID 20302962, compound

Reagents, catalysts & solvents 2

HCID 935NickelCatalystHCID 702EthanolSolvent

Procedure

24.8 g (0.1 mol) of 3-pyrazol-1-yl-7-chloro-benzo-1,2,4-triazine 1-oxide were hydrogenated in 150 ml of ethanol at 25° to 30° C. in the presence of Raney nickel under a hydrogen pressure of 50 bars, until the pressure remained constant. The catalyst was filtered off and the solution was evaporated in vacuo. 3-(Pyrazol-1-yl)-7-chloro-benzo-1,2,4-triazine of melting point 188° C. was obtained in virtually quantitative yield. The compound could be recrystallized from toluene.

Workup

  1. filtrationThe catalyst was filtered off
  2. customthe solution was evaporated in vacuo

Sources & evidence

ORD record
ord-1b8578aac02845e2a52639df6b3b0c25
Source dataset
uspto-grants-1980_12
Patent number
US04239760

Reaction notes

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