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

HRID 1362388Notes

Reaction equation

HRID 1362388 reaction equation
[CH3:1][O:2][C:3]1[C:4]([O:12][CH2:13][CH2:14][CH3:15])=[C:5]([CH:9]=[CH:10][CH:11]=1)[CH2:6][NH:7][CH3:8].[CH3:16][C:17]1([CH3:33])[O:22][C:21]2[CH:23]=[C:24]([CH:27]=[CH:28][C:29]([OH:31])=O)[CH:25]=[N:26][C:20]=2[NH:19][C:18]1=[O:32].ON1C2C=CC=CC=2N=N1.C(N(C(C)C)CC)(C)C.CN(C)CCCN=C=NCC>CN(C=O)C.O>[CH3:33][C:17]1([CH3:16])[O:22][C:21]2[CH:23]=[C:24](/[CH:27]=[CH:28]/[C:29]([N:7]([CH2:6][C:5]3[CH:9]=[CH:10][CH:11]=[C:3]([O:2][CH3:1])[C:4]=3[O:12][CH2:13][CH2:14][CH3:15])[CH3:8])=[O:31])[CH:25]=[N:26][C:20]=2[NH:19][C:18]1=[O:32]

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 28338626(3-Methoxy-2-propoxybenzyl)methylamineHCID 669676363-(2,2-dimethyl-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)-acrylic acid

Product 1

HCID 16660813(E)-3-(2,2-Dimethyl-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)-N-(3-methoxy-2-propoxy-benzyl)-N-methyl-acrylamideYield 75%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of (3-methoxy-2-propoxy-benzyl)-methyl-amine (115 mg, 0.55 mmol) in DMF (5 mL) were added in sequential order 3-(2,2-dimethyl-3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)-acrylic acid (181 mg, 0.5 mmol), 1-hydroxybenzotriazole (74 mg, 0.55 mmol), diisopropylethylamine (261 uL, 1.5 mmol), and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide (110 mg, 0.55 mmol). The reaction was placed in a microwave at 130° C. for 5 min. The solution was cooled in an ice bath and water was added with rapid stirring. The precipitate was filtered, dried and triturated with diethyl ether to yield the title compound (164 mg, 75%) as a white solid and as a mixture of amide rotomers: 1H NMR (400 MHz, DMSO-d6) δ 11.37-11.39 (m, 1H), 8.14-8.18 (m, 1H), 7.87-7.93 (m, 1H), 7.47-7.53 (m, 1H), 7.27-7.34 (m, 1H), 6.92-7.09 (m, 3H), 6.60-6.66 (m, 1H), 4.62-4.79 (m, 2H), 3.84-3.90 (m, 2H), 3.78 (s, 3H), 2.88-3.09 (m, 3H), 1.70-1.74 (m, 2H), 1.40-1.49 (m 6H), 0.93-0.99 (m, 3H); MS (ESI) m/e 440 (C24H29N3O5+H)+.

Workup

  1. temperatureThe solution was cooled in an ice bath
  2. filtrationThe precipitate was filtered
  3. customdried
  4. customtriturated with diethyl ether

Sources & evidence

ORD record
ord-132ad0a903334d11a57cf1d8978cd754
Source dataset
uspto-grants-2011_02
Patent number
US07879872B2

Reaction notes

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