1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (E)-N-((3-isopropylbenzofuran-2-yl)methyl)-N-methyl-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)acrylamide

HRID 1362401Notes

Reaction equation

HRID 1362401 reaction equation
[CH:1]([C:4]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[O:6][C:5]=1[CH2:13][NH:14][CH3:15])([CH3:3])[CH3:2].Cl.C[C:18]1(C)[O:23][C:22]2[CH:24]=[C:25]([CH:28]=[CH:29][C:30]([OH:32])=O)[CH:26]=[N:27][C:21]=2[NH:20][CH2:19]1.[OH:34]N1C2C=CC=CC=2N=N1.C(N(C(C)C)CC)(C)C.CN(C)CCCN=C=NCC>CN(C=O)C.O>[CH:1]([C:4]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[O:6][C:5]=1[CH2:13][N:14]([CH3:15])[C:30](=[O:32])/[CH:29]=[CH:28]/[C:25]1[CH:26]=[N:27][C:21]2[NH:20][C:19](=[O:34])[CH2:18][O:23][C:22]=2[CH:24]=1)([CH3:3])[CH3:2]

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 57742092HCID 57742092, compoundHCID 669677313-(2,2-dimethyl-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)acrylic acid hydrochloride

Product 1

HCID 16660977(E)-N-((3-isopropylbenzofuran-2-yl)methyl)-N-methyl-3-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)acrylamideYield 7%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of (3-isopropylbenzofuran-2-yl)-N-methylmethanamine (115 mg, 0.57 mmol) in DMF (5 mL) were added in sequential order 3-(2,2-dimethyl-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)acrylic acid hydrochloride (118 mg, 0.51 mmol), 1-hydroxybenzotriazole (77 mg, 0.57 mmol), diisopropylethylamine (289 uL, 1.54 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide (109 mg, 0.57 mmol). The mixture was stirred at room temperature overnight, cooled in an ice bath and water was added with rapid stirring. The product was extracted with ethyl acetate (3×10 mL), dried over sodium sulfate, filtered and concentrated to give a light brown solid (14 mg, 7%): 1H NMR (400 MHz, CD3OD) δ 11.42 (s, 1H), 8.17-8.16 (m, 1H), 7.89-7.86 (m, 1H), 7.74-7.72 (m, 2H), 7.24-7.30 (m, 2H), 7.22-7.17 (m, 2H), 4.97 (s, 2H), 4.78 (s, 2H), 3.15 (s, 3H), 3.10-3.14 (m, 1H), 1.34 (s, 6H); MS (ESI) m/e 406 (C23H23N3O4+H)+.

Workup

  1. temperaturecooled in an ice bath
  2. extractionThe product was extracted with ethyl acetate (3×10 mL)
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-c2fa00d98a004403866587d9ce01b9bb
Source dataset
uspto-grants-2011_02
Patent number
US07879872B2

Reaction notes

Loading…