1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 16660817, compound

HRID 2097138Notes

Reaction equation

HRID 2097138 reaction equation
[CH3:1][NH:2][CH2:3][C:4]1[O:5][C:6]2[CH:13]=[CH:12][CH:11]=[CH:10][C:7]=2[C:8]=1[CH3:9].[O:14]=[C:15]1[CH2:20][O:19][C:18]2[CH:21]=[C:22]([CH:25]=[CH:26][C:27](O)=[O:28])[CH:23]=[N:24][C:17]=2[NH:16]1.ON1C2C=CC=CC=2N=N1.C(N(C(C)C)CC)(C)C.CN(C)CCCN=C=NCC>CN(C=O)C.O>[CH3:1][N:2]([CH2:3][C:4]1[O:5][C:6]2[CH:13]=[CH:12][CH:11]=[CH:10][C:7]=2[C:8]=1[CH3:9])[C:27](=[O:28])/[CH:26]=[CH:25]/[C:22]1[CH:23]=[N:24][C:17]2[NH:16][C:15](=[O:14])[CH2:20][O:19][C:18]=2[CH:21]=1

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 46785639N-methyl-1-(3-methylbenzofuran-2-yl)methanamineHCID 669670993-(3-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)-acrylic acid

Product 1

HCID 16660817HCID 16660817, compoundYield 50.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of methyl-(3-methyl-benzofuran-2-ylmethyl)-amine (152 mg, 0.87 mmol) in DMF (5 mL) were added in sequential order 3-(3-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)-acrylic acid (175 mg, 0.79 mmol), 1-hydroxybenzotriazole (121 mg, 0.87 mmol), diisopropylethylamine (412 uL, 2.37 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide (174 mg, 0.87 mmol). The mixture was stirred at room temperature overnight, cooled in an ice bath and treated with water under rapid stirring. The precipitated product was filtered and dried, triturated with diethyl ether to yield the title compound (150 mg, 50%) as a light brown solid and as a mixtures of amide rotamers. 1H NMR (400 MHz, DMSO-d6) δ 11.46 (s, 1H), 8.19 (s, 1H), 7.89 (s, 1H), 7.5-7.59 (m, 3H), 7.24-7.32 (m, 3H), 4.8-5.02 (m, 2H), 4.70 (s, 2H), 2.95-3.19 (m, 3H), 2.28 (s, 3H); MS (ESI) m/e 378 (C21H19N3O4+H)+.

Workup

  1. temperaturecooled in an ice bath
  2. filtrationThe precipitated product was filtered
  3. customdried
  4. customtriturated with diethyl ether

Sources & evidence

ORD record
ord-759542f22fff456ba8b5565790cd1db4
Source dataset
uspto-grants-2013_05
Patent number
US08450307B2

Reaction notes

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