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

HRID 1646776Notes

Reaction equation

HRID 1646776 reaction equation
[CH3:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[NH:4][C:3]=1[CH2:11][CH2:12][NH:13][CH:14]([C:16]1[N:17]=[CH:18][N:19]([C:22]([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:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:20]=1[CH3:21])[CH3:15].C1CCN2C(=NCCC2)CC1.[O:52]1CCC[CH2:53]1>C(OCC)(=O)C>[CH3:1][C:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[N:4]2[C:53](=[O:52])[N:13]([CH:14]([C:16]3[N:17]=[CH:18][N:19]([C:22]([C:29]4[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=4)([C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=4)[C:35]4[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=4)[C:20]=3[CH3:21])[CH3:15])[CH2:12][CH2:11][C:3]=12

Participants

5

Reactant 3

HCID 8028TetrahydrofuranHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 100297853-methyl-2-[2-[[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]amino]ethyl]indole

Product 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

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 3-methyl-2-[2-[[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]amino]ethyl]indole (262 mg), N,N'-carbonyldiimidazole (210 mg), 1.8-diazabicyclo[5.4.0]-7-undecene (84 mg) and molecular sieves (100 mg) in dry tetrahydrofuran (3 ml) was stirred at reflux for 2 hours. The reaction mixture was diluted with ethyl acetate, washed with water and brine, dried over anhydrous magnesium sulfate and evaporated in vacuo. The residue was chromatographed over silica gel (eluted with 5% methanol in chloroform) to give 3,4-dihydro-5-methyl-2-[1-(5-methyl-1-trityl-1H-imidazol-4-yl)ethyl]-pyrimido[1,6-a]indol-1(2H)-one (208 mg) as glassy solid.

Workup

  1. temperatureat reflux for 2 hours
  2. washwashed with water and brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customevaporated in vacuo
  5. customThe residue was chromatographed over silica gel (eluted with 5% methanol in chloroform)

Sources & evidence

ORD record
ord-17df407c91be428b93eabd634cd48229
Source dataset
uspto-grants-1993_01
Patent number
US05180728

Reaction notes

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