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1,8-Diazabicyclo(5.4.0)undec-7-ene → 10-ethyl-8,9-dihydro-7-[(5-methyl-1-trityl-1H-imidazol-4-yl)methylene]pyrido[1,2-a]indol-6(7H)-one

HRID 847519
Notes
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Reaction equation

HRID 847519 reaction equation
C(O[CH:5]([C:22]1[N:23]=[CH:24][N:25]([C:28]([C:41]2[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=2)([C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[C:26]=1[CH3:27])[CH:6]1[C:20](=[O:21])[N:10]2[C:11]3[C:16]([C:17]([CH2:18][CH3:19])=[C:9]2[CH2:8][CH2:7]1)=[CH:15][CH:14]=[CH:13][CH:12]=3)(=O)C.N12CCCN=C1CCCCC2>C1(C)C=CC=CC=1.O>[CH2:18]([C:17]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[N:10]2[C:20](=[O:21])[C:6](=[CH:5][C:22]3[N:23]=[CH:24][N:25]([C:28]([C:41]4[CH:42]=[CH:43][CH:44]=[CH:45][CH:46]=4)([C:29]4[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=4)[C:35]4[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=4)[C:26]=3[CH3:27])[CH2:7][CH2:8][C:9]=12)[CH3:19]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 101002317-[(acetoxy)(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]-10-ethyl-8,9-dihydropyrido[1,2-a]indol-6(7H)-one

Product 1

HCID 5444750210-ethyl-8,9-dihydro-7-[(5-methyl-1-trityl-1H-imidazol-4-yl)methylene]pyrido[1,2-a]indol-6(7H)-oneYield 76%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent
HCID 1140
Toluene
Solvent

Conditions

Temperature
75 °C

Procedure

To a solution of 7-[(acetoxy)(5-methyl-1-trityl-1H-imidazol-4-yl)methyl]-10-ethyl-8,9-dihydropyrido[1,2-a]-indol-6(7H)-one (2.06 g) in toluene (30 ml) at room temperature was added 1,8-diazabicyclo[5.4.0]undec-7-ene (1.2 ml). After being stirred at 75° C. for 3 hours, the solution was diluted with chilled water. The organic layer separated was washed with aqueous oxalic acid solution, water, and brine, dried over anhydrous sodium sulfate, and evaporated in vacuo. The residue was triturated with methanol and filtered to give 10-ethyl-8,9-dihydro-7-[(5-methyl-1-trityl-1H-imidazol-4-yl-)methylene]pyrido[1,2-a]indol-6(7H)-one (1.41 g).

Workup

  1. customThe organic layer separated
  2. washwas washed with aqueous oxalic acid solution, water, and brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. customevaporated in vacuo
  5. customThe residue was triturated with methanol
  6. filtrationfiltered

Sources & evidence

ORD record
ord-95fc8561fa5442f6baed175d85cd553f
Source dataset
uspto-grants-1992_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05141945

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes