2-Dimethylaminopyridine → 5-[(2-Chloro)benzoyl]-3-(5-cyclopropyl-1,2,4-oxadiazol-3-yl)-4,5-dihydroimidazo[1,5-a]quinoxaline

HRID 1378753Notes

Reaction equation

HRID 1378753 reaction equation
[CH:1]1([C:4]2[O:8][N:7]=[C:6]([C:9]3[N:10]=[CH:11][N:12]4[C:21]5[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=5)[NH:15][CH2:14][C:13]=34)[N:5]=2)[CH2:3][CH2:2]1.[Cl:22][C:23]1[CH:31]=[CH:30][CH:29]=[CH:28][C:24]=1[C:25](Cl)=[O:26].CN(C1C=CC=CN=1)C.C(N(C(C)C)CC)(C)C>C1COCC1>[Cl:22][C:23]1[CH:31]=[CH:30][CH:29]=[CH:28][C:24]=1[C:25]([N:15]1[C:16]2[C:21](=[CH:20][CH:19]=[CH:18][CH:17]=2)[N:12]2[CH:11]=[N:10][C:9]([C:6]3[N:5]=[C:4]([CH:1]4[CH2:3][CH2:2]4)[O:8][N:7]=3)=[C:13]2[CH2:14]1)=[O:26]

Participants

6

Reactant 4

HCID 218852-DimethylaminopyridineHCID 691102-Chlorobenzoyl chlorideHCID 81531DiisopropylethylamineHCID 99937443-(5-Cyclopropyl-1,2,4-oxadiazol-3-yl)-4,5-dihydroimidazo[1,5-a]quinoxaline

Product 1

HCID 100706105-[(2-Chloro)benzoyl]-3-(5-cyclopropyl-1,2,4-oxadiazol-3-yl)-4,5-dihydroimidazo[1,5-a]quinoxaline

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A slurry consisting of 3-(5-cyclopropyl-1,2,4-oxadiazol-3-yl)-4,5-dihydroimidazo[1,5-a]quinoxaline (XXXIII, EXAMPLE 88, 0.492 g), 2-chlorobenzoyl chloride (0.268 ml), dimethylaminopyridine (0.0538 g), diisopropylethylamine (0.368 g), and THF (9 ml) is stirred at 20°-25° for 1.5 hr. The mixture is then partitioned between ethyl acetate, aqueous sodium bicarbonate, and saline. The product is poorly soluble in both the organic and aqueous phases, filtration of the extraction solvents gives additional material. The crude product is then triturated with ethyl ether and dried to give the title compound, mp 254°-256°; MS (m/z) at 417, 419; IR (mineral oil) 1659, 1576, 1508, 765 and 1394; NMR (CDCl3) 8.16 δ.

Workup

  1. customThe mixture is then partitioned between ethyl acetate, aqueous sodium bicarbonate, and saline
  2. filtrationaqueous phases, filtration of the extraction solvents
  3. customgives additional material
  4. customThe crude product is then triturated with ethyl ether
  5. customdried

Sources & evidence

ORD record
ord-e05ff171b7904321b0c19c22a37f9de1
Source dataset
uspto-grants-1997_09
Patent number
US05668282

Reaction notes

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