Hydrazine hydrate (1:1) → 8-(4-Fluorophenyl)-9-methyl-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one

HRID 907905Notes

Reaction equation

HRID 907905 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[C:17]([CH3:24])([C:18]3[N:22]([CH3:23])[N:21]=[CH:20][N:19]=3)[C:16](=O)[C:15]3[C:14]([C:26]([O:28]CC)=O)=[CH:13][CH:12]=[CH:11][C:10]=3[NH:9]2)=[CH:4][CH:3]=1.O.[NH2:32][NH2:33]>CO>[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[NH:9][C:10]3[C:15]4[C:16](=[N:32][NH:33][C:26](=[O:28])[C:14]=4[CH:13]=[CH:12][CH:11]=3)[C:17]2([CH3:24])[C:18]2[N:22]([CH3:23])[N:21]=[CH:20][N:19]=2)=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 24654Hydrazine hydrate (1:1)HCID 67262130Ethyl 2-(4-fluorophenyl)-3-methyl-3-(1-methyl-1H-1,2,4-triazol-5-yl)-4-oxo-1,2,3,4-tetrahydroquinoline-5-carboxylate

Product 1

HCID 1359984188-(4-Fluorophenyl)-9-methyl-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-oneYield 54%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A mixture of ethyl 2-(4-fluorophenyl)-3-methyl-3-(1-methyl-1H-1,2,4-triazol-5-yl)-4-oxo-1,2,3,4-tetrahydroquinoline-5-carboxylate (80 mg, 0.19 mmol) in 85% hydrazine monohydrate (5 mL) and methanol (1 mL) was stirred under reflux overnight. The resulting solution was cooled and filtered, washed the cake by methanol (2 mL) to obtain a white solid, dried in vacuum at 55° C. to obtain the title compound (40 mg, yield 54%). LC-MS (ESI) m/z: 377 (M+1)+; 1H-NMR (400 MHz, DMSO-d6) δ (ppm): 1.83 (s, 3H), 2.86 (s, 3H), 4.61 (s, 1H), 6.88-6.92 (m, 2H), 7.11-7.169 (t, J=8.8 Hz, 2H), 7.19-7.22 (d, J=8.0 Hz, 1H), 7.41 (s, 1H), 7.47-7.49 (m, 1H), 7.60-7.64 (t, J=8.0 Hz, 1H), 7.72 (s, 1H), 12.40 (s, 1H).

Workup

  1. temperatureunder reflux overnight
  2. temperatureThe resulting solution was cooled
  3. filtrationfiltered
  4. washwashed the cake by methanol (2 mL)
  5. customto obtain a white solid
  6. customdried in vacuum at 55° C.

Sources & evidence

ORD record
ord-bcbcaa23bf364d56be8bee9a0c7496f8
Source dataset
uspto-grants-2011_09
Patent number
US08012976B2

Reaction notes

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