tert-Butyl piperazine-1-carboxylate → HCID 16035853, compound

HRID 222306Notes

Reaction equation

HRID 222306 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]2[C:12](=[O:13])[C:11]3[CH:14]=[C:15]([CH:18]4[CH2:20][O:19]4)[CH:16]=[CH:17][C:10]=3[CH:9]=[CH:8][C:5]2=[N:6][CH:7]=1.[N:21]1([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1>CO>[Cl:1][C:2]1[CH:3]=[C:4]2[C:12](=[O:13])[C:11]3[CH:14]=[C:15]([CH:18]([OH:19])[CH2:20][N:24]4[CH2:23][CH2:22][N:21]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:26][CH2:25]4)[CH:16]=[CH:17][C:10]=3[CH:9]=[CH:8][C:5]2=[N:6][CH:7]=1

Participants

4

Reactant 2

HCID 143452tert-Butyl piperazine-1-carboxylateHCID 57722777HCID 57722777, compound

Product 1

HCID 16035853HCID 16035853, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

3-chloro-7-oxiran-2-yl-5H-benzo[4,5]cyclohepta[1,2-b]pyridin-5-one (60 mg, 0.21 mmol) was suspended in 2.5 mL of methanol. tert-Butyl piperazine-1-carboxylate (98 mg, 0.53 mmol) was added and the reaction was heated to reflux for 8 hours. The resulting mixture was concentrated in vacuo and purified directly via flash chromatography (15-100% ethyl acetate/hexanes) to afford the title compound. 1H NMR (600 MHz, CDCl3) δ 9.79 (d, 1H); 8.49 (d, 1H); 8.22 (d, 1H); 7.77 (dd, 1H); 7.60 (d, 1H); 7.31 (d, 1H); 7.25 (d, 1H); 4.91 (dd, 1H); 3.50-3.45 (m, 4H); 2.72 (broad s, 2H); 2.63 (dd, 1H); 2.50 (dd, 1H); 2.44 (broad s, 2H); 1.46 (s, 9H). Hydroxyl proton was not observed. LRMS (APCI) calc'd for (C25H29ClN3O4) [M+H]+, 470.2; found 470.2.

Workup

  1. temperaturethe reaction was heated
  2. temperatureto reflux for 8 hours
  3. concentrationThe resulting mixture was concentrated in vacuo
  4. custompurified directly via flash chromatography (15-100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-ee04717f981d40398c0a41e4dbbd96c7
Source dataset
uspto-grants-2012_06
Patent number
US08207186B2

Reaction notes

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