2-Mepp → HCID 10142877, compound

HRID 734117Notes

Reaction equation

HRID 734117 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:12]3[CH2:13][N:14]([C:17](=[O:19])[CH3:18])[CH2:15][CH2:16][C:11]=3[N:10]([CH2:20][CH:21]3[CH2:23][O:22]3)[N:9]=2)=[CH:4][C:3]=1[N+:24]([O-])=O.[O-]S(C(F)(F)F)(=O)=O.[Yb+3].[O-]S(C(F)(F)F)(=O)=O.[O-]S(C(F)(F)F)(=O)=O.[CH3:52][C:53]1[CH:58]=[CH:57][CH:56]=[CH:55][C:54]=1[N:59]1[CH2:64][CH2:63][NH:62][CH2:61][CH2:60]1>ClCCl.O>[NH2:24][C:3]1[CH:4]=[C:5]([C:8]2[C:12]3[CH2:13][N:14]([C:17](=[O:19])[CH3:18])[CH2:15][CH2:16][C:11]=3[N:10]([CH2:20][CH:21]([OH:22])[CH2:23][N:62]3[CH2:63][CH2:64][N:59]([C:54]4[CH:55]=[CH:56][CH:57]=[CH:58][C:53]=4[CH3:52])[CH2:60][CH2:61]3)[N:9]=2)[CH:6]=[CH:7][C:2]=1[Cl:1]

Participants

6

Reactant 3

HCID 919652-MeppHCID 2733225Ytterbium triflateHCID 17975402HCID 17975402, compound

Product 1

HCID 10142877HCID 10142877, compoundYield 93.7%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Procedure

A solution of 1-[3-(4-chloro-3-nitro-phenyl)-1-oxiranylmethyl-1,4,6,7-tetrahydro-pyrazolo[4,3-c]pyridin-5-yl]-ethanone (0.754 g, 2.0 mmol) in dichloromethane (10 mL) was treated with ytterbium(III)triflate (0.25 g, 0.40 mmol) and 1-(2-methylphenyl)-piperazine (0.705 g, 4.0 mmol) at room temperature. The reaction mixture was stirred at room temperature for 16 h and diluted with dichloromethane (100 mL) and water (50 mL). The organic layer was separated, washed with water (2×50 mL), dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography (silica, 5% MeOH/CH2Cl2) to afford 0.98 g (90%) of the desired product as a light yellow solid. MS (electrospray): m/z 553.2 (553.2, calculated for C28H33ClN6O4, [M+H]+). 1H NMR (CDCl3, 400 MHz, a mixture of two rotamers): 8.25-8.15 (m, 1H), 7.75-7.70 (m, 1H), 7.63-7.55 (m, 1H) 7.20-7.10(m, 2H), 7.05-6.95 (m, 2H), 4.90-4.70 (m, 1H), 4.65 (s, 1H), 4.30-4.15 (m, 2H), 4.10-3.70 (m, 4H), 3.00-2.40 (m, 12H), 2.20(s, 3H), 2.15 (s, 1.5H), 2.10 (s, 1.5H).

Workup

  1. customThe organic layer was separated
  2. washwashed with water (2×50 mL)
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by column chromatography (silica, 5% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-a5aadf25ffb14927897a2fce7f6e7aed
Source dataset
uspto-grants-2009_09
Patent number
US07589202B2

Reaction notes

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