Potassium Carbonate → (R)-6-(1-benzhydryl-3-methyl-azetidin-3-ylamino)-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one

HRID 519133Notes

Reaction equation

HRID 519133 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]2[C:13](=[CH:14][CH:15]=1)[O:12][CH2:11][C:10]1[N:5]2[C@H:6]([CH3:17])[C:7](=[O:16])[NH:8][N:9]=1.[CH:18]([N:31]1[CH2:34][C:33](OS(C)(=O)=O)([CH3:35])[CH2:32]1)([C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.C([O-])([O-])=O.[K+].[K+]>CC(O)C>[CH:18]([N:31]1[CH2:34][C:33]([NH:1][C:2]2[CH:3]=[C:4]3[C:13](=[CH:14][CH:15]=2)[O:12][CH2:11][C:10]2[N:5]3[C@H:6]([CH3:17])[C:7](=[O:16])[NH:8][N:9]=2)([CH3:35])[CH2:32]1)([C:25]1[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=1)[C:19]1[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 100652951-Benzhydryl-3-methylazetidin-3-yl methanesulfonateHCID 86727520(R)-6-amino-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one

Product 1

HCID 86727521(R)-6-(1-benzhydryl-3-methyl-azetidin-3-ylamino)-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-oneYield 38.5%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of (R)-6-amino-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (50 g, 172 mmol), methansulfonic acid 1-benzhydryl-3-methylazetidin-3-yl ester (Preparation #14, Step B, 95 g, 258 mmol) and K2CO3 (47.6 g, 344 mmol) in iPrOH (1 L) was stirred at 90° C. for 16 h. The reaction mixture was cooled to ambient temperature and concentrated in vacuo. The residue was dissolved in water (1 L) and extracted with EtOAc (3×500 mL). The combined organic phase was dried over anhydrous Na2SO4 and filtered. The filtrate was concentrated and the residue was purified by column chromatography on silica gel (eluting with 30-60% EtOAc in petroleum ether) to give (R)-6-(1-benzhydryl-3-methyl-azetidin-3-ylamino)-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triaza-phenanthren-3-one (31 g, 38%) as a yellow solid. 1H NMR (CDCl3, 400 MHz): δ 8.47 (s, 1H), 7.45-7.40 (m, 4H), 7.30-7.26 (m, 4H), 7.22-7.16 (m, 2H), 6.78 (d, J=9.0 Hz, 1H), 6.08-6.02 (m, 2H), 4.64-4.57 (t, J=6.8 Hz, 1H), 4.53-4.41 (d, J=14.8 Hz, 3H), 3.30 (m, 2H), 3.15 (m, 2H), 1.65 (s, 3H), 1.46 (d, J=6.8 Hz, 3H). SFC (Table 1, Method 1) Rt=4.36 min.

Workup

  1. temperatureThe reaction mixture was cooled to ambient temperature
  2. concentrationconcentrated in vacuo
  3. dissolutionThe residue was dissolved in water (1 L)
  4. extractionextracted with EtOAc (3×500 mL)
  5. dry with materialThe combined organic phase was dried over anhydrous Na2SO4
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated
  8. customthe residue was purified by column chromatography on silica gel (eluting with 30-60% EtOAc in petroleum ether)

Sources & evidence

ORD record
ord-58977cb711ca49b78e3e99e607219391
Source dataset
uspto-grants-2015_08
Patent number
US09115151B2

Reaction notes

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