Hydrochloric Acid → 4-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-7-(2-methyl-1H-imidazo[4,5-b]pyridin-6-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepine

HRID 241105Notes

Reaction equation

HRID 241105 reaction equation
[CH3:1][C:2]1([CH3:41])[CH2:11][CH2:10][C:9]2[N:8]=[CH:7][N:6]=[C:5]([N:12]3[CH2:18][C:17]4[CH:19]=[C:20]([C:23]5[CH:24]=[C:25]6[N:31](COCC[Si](C)(C)C)[C:30]([CH3:40])=[N:29][C:26]6=[N:27][CH:28]=5)[CH:21]=[CH:22][C:16]=4[O:15][CH2:14][CH2:13]3)[C:4]=2[CH2:3]1.Cl>CO>[CH3:1][C:2]1([CH3:41])[CH2:11][CH2:10][C:9]2[N:8]=[CH:7][N:6]=[C:5]([N:12]3[CH2:18][C:17]4[CH:19]=[C:20]([C:23]5[CH:24]=[C:25]6[NH:31][C:30]([CH3:40])=[N:29][C:26]6=[N:27][CH:28]=5)[CH:21]=[CH:22][C:16]=4[O:15][CH2:14][CH2:13]3)[C:4]=2[CH2:3]1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 668205234-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-7-[2-methyl-1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazo[4,5-b]pyridin-6-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepine

Product 1

HCID 595866604-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-7-(2-methyl-1H-imidazo[4,5-b]pyridin-6-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepineYield 67%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A solution of 4-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-7-[2-methyl-1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazo[4,5-b]pyridin-6-yl]-2,3,4,5-tetrahydro-1,4-benzoxazepine (0.54 g, 0.95 mmol) in a mixture of methanol (30 mL) and concentrated hydrochloric acid (1 mL) was stirred at reflux for 16 hours. On cooling to room temperature the solution was concentrated and the pH was adjusted to ˜9 by the addition of 50% aqueous sodium hydroxide and diluted with ethyl acetate (100 mL). The organic layer was washed with 2M aqueous sodium hydroxide (20 mL) and brine, dried over anhydrous sodium sulfate, filtered and concentrated. The precipitating white solid was collected by filtration and washed with hexane to provide 4-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-7-(2-methyl-1H-imidazo[4,5-b]pyridin-6-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepine (0.28 g, 67%). 1H NMR (400 MHz, d6-DMSO): 8.53 (d, 1H), 8.38 (s, 1H), 8.03 (d, 1H), 7.70 (d, 1H), 7.54 (dd, 1H), 7.05 (d, 1H), 4.63 (s, 2H), 4.33 (m, 2H), 3.85 (m, 2H), 2.72 (m, 2H), 2.58 (s, 3H), 2.47 (s, 2H), 1.60 (m, 2H), 0.86 (s, 6H); MS (EI) for C26H28N6O: 441 (MH+).

Workup

  1. temperatureat reflux for 16 hours
  2. concentrationwas concentrated
  3. additionthe pH was adjusted to ˜9 by the addition of 50% aqueous sodium hydroxide
  4. additiondiluted with ethyl acetate (100 mL)
  5. washThe organic layer was washed with 2M aqueous sodium hydroxide (20 mL) and brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. filtrationThe precipitating white solid was collected by filtration
  10. washwashed with hexane

Sources & evidence

ORD record
ord-6acb8a1effa5414896e5f974bd0db541
Source dataset
uspto-grants-2014_02
Patent number
US08648066B2

Reaction notes

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