3-(Trifluoromethyl)aniline → 8-ethyl-2-methyl-N-[3-(trifluoromethyl)-phenyl]-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]-pyrimidin-5-amine

HRID 224619Notes

Reaction equation

HRID 224619 reaction equation
Cl[C:2]1[C:7]2[CH:8]=[N:9][C:10]3[N:14]([CH2:15][CH3:16])[N:13]=[CH:12][C:11]=3[C:6]=2[N:5]2[N:17]=[C:18]([CH3:20])[CH:19]=[C:4]2[N:3]=1.C(N(CC)CC)C.[F:28][C:29]([F:38])([F:37])[C:30]1[CH:31]=[C:32]([CH:34]=[CH:35][CH:36]=1)[NH2:33]>C(O)CCC>[CH2:15]([N:14]1[C:10]2[N:9]=[CH:8][C:7]3[C:2]([NH:33][C:32]4[CH:34]=[CH:35][CH:36]=[C:30]([C:29]([F:28])([F:37])[F:38])[CH:31]=4)=[N:3][C:4]4[N:5]([N:17]=[C:18]([CH3:20])[CH:19]=4)[C:6]=3[C:11]=2[CH:12]=[N:13]1)[CH3:16]

Participants

5

Reactant 3

HCID 73753-(Trifluoromethyl)anilineHCID 8471TriethylamineHCID 537035595-chloro-8-ethyl-2-methyl-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine

Product 1

HCID 233316038-ethyl-2-methyl-N-[3-(trifluoromethyl)-phenyl]-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]-pyrimidin-5-amineYield 72.9%

Reagents, catalysts & solvents 1

HCID 2631-ButanolSolvent

Procedure

5.8 g of 5-chloro-8-ethyl-2-methyl-8H-pyrazolo[1,5-a]-pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine (0.02 mol), 3 g of triethylamine and 3.3 g of 3-trifluoromethylaniline are refluxed in butyl alcohol for 24 hours with stirring. The solvent is removed in vacuo and the residue treated with 20 ml of water and filtered off. Recrystallization from alcohol yields 6 g of 8-ethyl-2-methyl-N-[3-(trifluoromethyl)-phenyl]-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]-pyrimidin-5-amine; yield (73%) m.p. 205°-206°.

Workup

  1. customThe solvent is removed in vacuo
  2. additionthe residue treated with 20 ml of water
  3. filtrationfiltered off
  4. customRecrystallization from alcohol

Sources & evidence

ORD record
ord-28dac4fc4fb74a3bb911951becc08582
Source dataset
uspto-grants-1980_11
Patent number
US04233300

Reaction notes

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