Triethylamine → Cyclopentanecarboxylic acid (2,4-Dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazapin-3-yl)-amide

HRID 1350468Notes

Reaction equation

HRID 1350468 reaction equation
[NH2:1][CH:2]1[C:8](=[O:9])[NH:7][C:6]2[CH:10]=[CH:11][CH:12]=[CH:13][C:5]=2[NH:4][C:3]1=[O:14].C(N(CC)CC)C.[CH:22]1([C:27](Cl)=[O:28])[CH2:26][CH2:25][CH2:24][CH2:23]1>CN(C=O)C>[O:9]=[C:8]1[NH:7][C:6]2[CH:10]=[CH:11][CH:12]=[CH:13][C:5]=2[NH:4][C:3](=[O:14])[CH:2]1[NH:1][C:27]([CH:22]1[CH2:26][CH2:25][CH2:24][CH2:23]1)=[O:28]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 78284Cyclopentanecarbonyl chlorideHCID 219558063-amino-1H-1,5-benzodiazepine-2,4(3H,5H)-dione

Product 1

HCID 58860677Cyclopentanecarboxylic acid (2,4-Dioxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazapin-3-yl)-amideYield 87%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Combine 3-amino-1H-1,5-benzodiazepine-2,4-(3H, 5H)-dione (7.0 g, 36.6 mmol) and triethyl amine (4.07 g, 40.3 mmol) in 120 mL DMF and add dropwise cyclopentanecarbonyl chloride (5.34 g, 40.3 mmol) at RT. After stirring overnight, remove DMF under reduced pressure, suspend the residue in a mixed solvent (CHCl3/i-PrOH=3/1, 400 mL). Collect an off-white solid via suction filtration to give the title compound. Wash the filtrate with NaHCO3 (sat.2×100 mL) and dry with Na2SO4. Concentrate the the solvent to give second crop of title compound, total 9.13 g, yield 87%: 1H NMR (300 MHz, DMSO-d6): 10.70 (s, 2H), 8.11 (d, 1H, J=7.8 Hz), 7.24–7.15 (m, 4H), 4.73 (d, 1H, J=7.5 Hz), 2.96–2.87 (m, 1H), 1.74–1.45 (m, 8H).

Workup

  1. customremove DMF under reduced pressure
  2. customCollect an off-white solid
  3. filtrationvia suction filtration

Sources & evidence

ORD record
ord-c394e864a8de47468f51e78201357ba6
Source dataset
uspto-grants-2007_05
Patent number
US07214673B2

Reaction notes

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