Acetic Acid → 1-Ethyl-3,3,5-trimethyl-7-{3-[(2-pyridin-3-ylethyl)pyridin-4-ylmethylamino]propoxy}-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione

HRID 1183090Notes

Reaction equation

HRID 1183090 reaction equation
[N:1]1[CH:6]=[CH:5][C:4]([CH:7]=O)=[CH:3][CH:2]=1.C(O)(=O)C.[CH2:13]([N:15]1[C:21](=[O:22])[C:20]([CH3:24])([CH3:23])[C:19](=[O:25])[N:18]([CH3:26])[C:17]2[CH:27]=[C:28]([O:31][CH2:32][CH2:33][CH2:34][NH:35][CH2:36][CH2:37][C:38]3[CH:39]=[N:40][CH:41]=[CH:42][CH:43]=3)[CH:29]=[CH:30][C:16]1=2)[CH3:14].[Na]>ClCCl.ClCCCl>[CH2:13]([N:15]1[C:21](=[O:22])[C:20]([CH3:24])([CH3:23])[C:19](=[O:25])[N:18]([CH3:26])[C:17]2[CH:27]=[C:28]([O:31][CH2:32][CH2:33][CH2:34][N:35]([CH2:36][CH2:37][C:38]3[CH:39]=[N:40][CH:41]=[CH:42][CH:43]=3)[CH2:7][C:4]3[CH:3]=[CH:2][N:1]=[CH:6][CH:5]=3)[CH:29]=[CH:30][C:16]1=2)[CH3:14]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 133894-PyridinecarboxaldehydeHCID 5360545SodiumHCID 686730021-Ethyl-3,3,5-trimethyl-7-[3-(2-pyridin-3-ylethylamino) propoxy]-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione

Product 1

HCID 510382801-Ethyl-3,3,5-trimethyl-7-{3-[(2-pyridin-3-ylethyl)pyridin-4-ylmethylamino]propoxy}-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dioneYield 88%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 6344DichloromethaneSolvent

Procedure

4-Pyridinecarbaldehyde (1.18 ml, 12.5 mmol) and a catalytic amount of acetic acid were added to a 1,2-dichloroethane solution (40 ml) of 1-ethyl-3,3,5-trimethyl-7-[3-(2-pyridin-3-ylethylamino)propoxy]-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione (4.44 g, 10.5 mmol), and stirred for 30 minutes. Sodium triacetoxyhydroborate (3.33 g, 15.7 mmol) was added to the resulting mixture, and stirred at room temperature overnight. The reaction mixture was diluted with dichloromethane, washed with water and a saturated sodium chloride aqueous solution in this order, then dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (ethyl acetate:methanol=1:0→9:1). The purified product was concentrated under reduced pressure to thereby obtain 4.73 g (yield: 88%) of 1-ethyl-3,3,5-trimethyl-7-{3-[(2-pyridin-3-ylethyl)pyridin-4-ylmethylamino]propoxy}-1,5-dihydrobenzo[b][1,4]diazepine-2,4-dione as a pale yellow oil.

Workup

  1. stirringstirred at room temperature overnight
  2. washwashed with water
  3. dry with materiala saturated sodium chloride aqueous solution in this order, then dried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel flash chromatography (ethyl acetate:methanol=1:0→9:1)
  6. concentrationThe purified product was concentrated under reduced pressure

Sources & evidence

ORD record
ord-13af3123cb9444438de4ecdd08336929
Source dataset
uspto-grants-2014_03
Patent number
US08664217B2

Reaction notes

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