Water → 2-trifluoromethyl-nicotinic acid N'-(3,4-dimethoxy-5-nitro-benzoyl)-hydrazide

HRID 42634Notes

Reaction equation

HRID 42634 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:9]=[C:10]([N+:14]([O-:16])=[O:15])[C:11]=1[O:12][CH3:13])[C:6]([OH:8])=O.[F:17][C:18]([F:30])([F:29])[C:19]1[N:28]=[CH:27][CH:26]=[CH:25][C:20]=1[C:21]([NH:23][NH2:24])=[O:22].O>O1CCCC1>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:9]=[C:10]([N+:14]([O-:16])=[O:15])[C:11]=1[O:12][CH3:13])[C:6]([NH:24][NH:23][C:21](=[O:22])[C:20]1[CH:25]=[CH:26][CH:27]=[N:28][C:19]=1[C:18]([F:17])([F:29])[F:30])=[O:8]

Participants

5

Reactant 3

HCID 962WaterHCID 219286243,4-Dimethoxy-5-nitrobenzoic acidHCID 670371942-(Trifluoromethyl)pyridine-3-carbohydrazide

Product 1

HCID 670371772-trifluoromethyl-nicotinic acid N'-(3,4-dimethoxy-5-nitro-benzoyl)-hydrazideYield 73.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 3,4-dimethoxy-5-nitrobenzoic acid (0.53 g, 2.34 mmol) and 1,1-carbonyldiimidazole (0.42 g, 2.59 mmol) was heated in tetrahydrofuran (10 mL) at reflux for three hours and then cooled to room temperature. 2-Trifluoromethyl-nicotinic acid hydrazide (0.53 g, 2.57 mmol) was added in one portion and the yellowish mixture was stirred at reflux overnight and then allowed to cool to room temperature. The mixture was poured onto cold water (100 mL) and the copious precipitate was filtered off, washed with water and dried to give 2-trifluoromethyl-nicotinic acid N′-(3,4-dimethoxy-5-nitro-benzoyl)-hydrazide (0.71 g, 73%).

Workup

  1. temperatureat reflux for three hours
  2. temperatureat reflux overnight
  3. temperatureto cool to room temperature
  4. filtrationthe copious precipitate was filtered off
  5. washwashed with water
  6. customdried

Sources & evidence

ORD record
ord-420d31a7195447c7b87e1e27eb2edc8a
Source dataset
uspto-grants-2013_09
Patent number
US08536203B2

Reaction notes

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