Triethylamine → N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1,4-dimethyl-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonamide

HRID 1770490Notes

Reaction equation

HRID 1770490 reaction equation
[CH3:1][N:2]1[C:11]2[C:6](=[CH:7][C:8]([S:12](Cl)(=[O:14])=[O:13])=[CH:9][CH:10]=2)[N:5]([CH3:16])[C:4](=[O:17])[C:3]1=[O:18].[O:19]1[CH2:24][CH2:23][O:22][C:21]2[CH:25]=[C:26]([NH2:29])[CH:27]=[CH:28][C:20]1=2.C(N(CC)CC)C>ClCCl>[O:19]1[CH2:24][CH2:23][O:22][C:21]2[CH:25]=[C:26]([NH:29][S:12]([C:8]3[CH:7]=[C:6]4[C:11](=[CH:10][CH:9]=3)[N:2]([CH3:1])[C:3](=[O:18])[C:4](=[O:17])[N:5]4[CH3:16])(=[O:14])=[O:13])[CH:27]=[CH:28][C:20]1=2

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 891481,4-Benzodioxan-6-ylamineHCID 463183331,4-Dimethyl-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonyl chloride

Product 1

HCID 3239422N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1,4-dimethyl-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonamide

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1,4-dimethyl-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonyl chloride (example 6-3a, 450 mg, 1.6 mmol) was added to a stirred solution of the 2,3-dihydrobenzo[b][1,4]dioxin-6-amine (215 mg, 1.4 mmol) and triethylamine (170 mg, 1.7 mmol) in dichloromethane (10 mL). The reaction was stirred at ambient temperature overnight then concentrated. The crude product was purified by silica gel chromatography (0-30% ethyl acetate in hexanes) to provide N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1,4-dimethyl-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonamide as a white solid. MS (M+H, 404.10); 1H NMR (400 MHz, DMSO-d6): δ, ppm: 3.47 (s, 3H), 3.49 (s, 3H), 4.12 (m, 4H), 6.55 (m, 1H), 6.61 (d, J=2.4 Hz, 1H), 6.69 (d, J=8.4 Hz, 1H), 7.53 (m, 1H), 7.59 (d, J=2 Hz, 1H), 10.00 (s, 1H).

Workup

  1. concentrationthen concentrated
  2. customThe crude product was purified by silica gel chromatography (0-30% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-64c0da6bbf3f494abf7290cf6ff23183
Source dataset
uspto-grants-2016_02
Patent number
US09247759B2

Reaction notes

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