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(+)-3,4-dihydro-5-methyl-2-[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a]indol-1(2H)-one → 3,4-dihydro-5-methyl-2-[1-(5-methyl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a]-indol-1(2H)-one

HRID 1657321
Notes
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Reaction equation

HRID 1657321 reaction equation
[CH3:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[N:4]2[C:11](=[O:42])[N:12]([CH:15]([C:17]3[N:18]=[CH:19][N:20](C(C4C=CC=CC=4)(C4C=CC=CC=4)C4C=CC=CC=4)[C:21]=3[CH3:22])[CH3:16])[CH2:13][CH2:14][C:3]=12>C(O)(=O)C.O>[CH3:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[N:4]2[C:11](=[O:42])[N:12]([CH:15]([C:17]3[N:18]=[CH:19][NH:20][C:21]=3[CH3:22])[CH3:16])[CH2:13][CH2:14][C:3]=12
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 1

HCID 10460239(+)-3,4-dihydro-5-methyl-2-[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a]indol-1(2H)-one

Product 1

HCID 98830773,4-dihydro-5-methyl-2-[1-(5-methyl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a]-indol-1(2H)-one

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 962WaterSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 3,4-dihydro-5-methyl-2-[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a]indol-1(2H)-one (60 mg) in 70% acetic acid in water (2.6 ml) was stirred at 60° C. for 2 hours. After evaporation of the solvent, the residue was dissolved in 10% methanol in chloroform. The mixture was washed with aqueous sodium bicarbonate solution and brine, dried over anhydrous magnesium sulfate, and evaporated in vacuo. The residue was purified by silica gel column chromatography (10% methanol-chloroform) to give 3,4-dihydro-5-methyl-2-[1-(5-methyl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a]-indol-1(2H)-one as a powder. The powder was dissolved in 9N hydrogen chloride in ethanol (1 ml) and evaporated in vacuo. The residue was triturated with ether to give 3,4-dihydro-5-methyl-2-[1-(5-methyl-1H-imidazol-4-yl)ethyl]pyrimido[1,6-a[indol-1(2H)-one hydrochloride (36.8 mg).

Workup

  1. customAfter evaporation of the solvent
  2. dissolutionthe residue was dissolved in 10% methanol in chloroform
  3. washThe mixture was washed with aqueous sodium bicarbonate solution and brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customevaporated in vacuo
  6. customThe residue was purified by silica gel column chromatography (10% methanol-chloroform)

Sources & evidence

ORD record
ord-de971e6d942e41999c3fa7d346a8fbea
Source dataset
uspto-grants-1993_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05256780

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes