Pyridine → HCID 86634058, compound

HRID 1687931Notes

Reaction equation

HRID 1687931 reaction equation
[CH3:1][C:2]1([CH3:16])[CH2:8][CH2:7][CH2:6][NH:5][C:4]2[CH:9]=[C:10]([N+:13]([O-:15])=[O:14])[CH:11]=[CH:12][C:3]1=2.N1C=CC=CC=1.Cl[C:24]([O:26][C:27]1[CH:32]=[CH:31][C:30]([N+:33]([O-:35])=[O:34])=[CH:29][CH:28]=1)=[O:25]>CN(C)C1C=CN=CC=1.ClCCCl>[N+:33]([C:30]1[CH:29]=[CH:28][C:27]([O:26][C:24]([N:5]2[CH2:6][CH2:7][CH2:8][C:2]([CH3:16])([CH3:1])[C:3]3[CH:12]=[CH:11][C:10]([N+:13]([O-:15])=[O:14])=[CH:9][C:4]2=3)=[O:25])=[CH:32][CH:31]=1)([O-:35])=[O:34]

Participants

6

Reactant 3

HCID 1049PyridineHCID 821294-Nitrophenyl chloroformateHCID 574702565,5-dimethyl-8-nitro-2,3,4,5-tetrahydro-1H-benzo[b]azepine

Product 1

HCID 86634058HCID 86634058, compoundYield 46%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 111,2-DichloroethaneSolvent

Procedure

5,5-Dimethyl-8-nitro-2,3,4,5-tetrahydro-1H-benzo[b]azepine (0.797 g, 3.62 mmol), Pyridine (6.310 mL, 3.83 mmol) and 4-Dimethylaminopyridine (21 mg, 0.17 mmol) were dissolved in anhydrous 1,2-Dichloroethane (5.0 mL) before adding p-Nitrophenyl Chloroformate (0.541 g, 2.68 mmol). The reaction was stirred at room temperature for 41 hours and then concentrated under reduced pressure. The residue was purified by normal phase chromatography to yield an off-white solid, 5,5-Dimethyl-8-nitro-2,3,4,5-tetrahydro-benzo[b]azepine-1-carboxylic acid 4-nitro-phenyl ester (0.475 g, 46%). LCMS: m/z=386.07 (M+H+). 1H NMR (400 MHz, CDCl3) δ 8.21 (m, 4H), 7.65 (d, 1H, J=8.8 Hz), 7.42 (m, 1H), 7.23 (m, 1H), 4.53 (m, 1H), 2.87 (m, 1H), 2.32 (m, 1H), 1.69 (m, 5H), 1.34 (m, 4H).

Workup

  1. concentrationconcentrated under reduced pressure
  2. customThe residue was purified by normal phase chromatography

Sources & evidence

ORD record
ord-5616627e07884ce7aae251f08df090c8
Source dataset
uspto-grants-2012_04
Patent number
US08148391B2

Reaction notes

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