Trityl chloride → 8,9-dihydro-10-ethyl-7-[(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]-indol-6(7H)-one

HRID 1681749Notes

Reaction equation

HRID 1681749 reaction equation
[CH2:1]([C:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[N:5]2[C:12](=[O:23])[CH:13]([CH2:16][C:17]3[N:18]=[CH:19][NH:20][C:21]=3[CH3:22])[CH2:14][CH2:15][C:4]=12)[CH3:2].[C:24](Cl)([C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1)([C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1.C(N(CC)CC)C>CN(C)C=O.O>[CH2:1]([C:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[N:5]2[C:12](=[O:23])[CH:13]([CH2:16][C:17]3[N:18]=[CH:19][N:20]([C:24]([C:25]4[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=4)([C:37]4[CH:38]=[CH:39][CH:40]=[CH:41][CH:42]=4)[C:31]4[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=4)[C:21]=3[CH3:22])[CH2:14][CH2:15][C:4]=12)[CH3:2]

Participants

6

Reactant 3

HCID 6456Trityl chlorideHCID 8471TriethylamineHCID 1172276110-ethyl-8,9-dihydro-7-[(5-methyl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6(7H)-one

Product 1

HCID 190973078,9-dihydro-10-ethyl-7-[(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]-indol-6(7H)-oneYield 45.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of 8,9-dihydro-10-ethyl-7-[(5-methyl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6-(7H)-one (0.84 g), trityl chloride (1.0 g) and triethylamine (515 mg) in N,N-dimethylformamide (10 ml) was stirred at room temperature for 18 hours. The reaction mixture was diluted with chilled water and extracted twice with ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous magnesium sulfate, and evaporated in vacuo. Purification of the residue with silica gel column chromatography (2% methanol-chloroform) gave 8,9-dihydro-10-ethyl-7-[(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6(7H)-one (690 mg).

Workup

  1. extractionextracted twice with ethyl acetate
  2. washThe organic layer was washed with water and brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customevaporated in vacuo
  5. customPurification of the residue with silica gel column chromatography (2% methanol-chloroform)

Sources & evidence

ORD record
ord-195d08ab9b784ef48ffbebb20462ba97
Source dataset
uspto-grants-1992_12
Patent number
US05173493

Reaction notes

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