Hydrochloric Acid → [(11S)-6-amino-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinolin-11-yl]methanol

HRID 549145Notes

Reaction equation

HRID 549145 reaction equation
C([O:8][CH2:9][C@@H:10]1[N:15]2[C:16]3[C:25]4[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=4)[N:19]=[C:18]([NH2:26])[C:17]=3[N:27]=[C:14]2[CH2:13][O:12][CH2:11]1)C1C=CC=CC=1.Cl>CO.[Pd].C(O)C>[NH2:26][C:18]1[C:17]2[N:27]=[C:14]3[CH2:13][O:12][CH2:11][C@H:10]([CH2:9][OH:8])[N:15]3[C:16]=2[C:25]2[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=2)[N:19]=1

Participants

6

Reactant 2

HCID 313Hydrochloric AcidHCID 11639085(11S)-11-[(benzyloxy)methyl]-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinolin-6-amine

Product 1

HCID 11623169[(11S)-6-amino-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinolin-11-yl]methanolYield 38.1%

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 887MethanolSolvent

Procedure

(11S)-11-[(Benzyloxy)methyl]-10,11-dihydro-8H-[1,4]oxazino[4′,3′:1,2]imidazo[4,5-c]quinolin-6-amine (297 mg, 0.825 mmol) was dissolved in 20 mL of methanol and the solution was placed in a pressure bottle. Palladium on carbon (10%, 230 mg) and 0.5 mL of 3 M HCl in ethanol were then added and the reaction mixture was shaken under H2 at 50 PSI (3.4×105 Pa). After 18 hours, the reaction mixture was filtered through a pad of CELITE filter agent. The pad was rinsed with methanol and the combined filtrates were concentrated under reduced pressure. The residue was dissolved in H2O and the solution was made basic by the addition of concentrated aqueous NH4OH solution. The aqueous solution was extracted with 10% MeOH/CH2Cl2 several times and the combined organic layers were concentrated under reduced pressure. Chromatography (SiO2, 25-75% CMA/CHCl3) gave a white powder. Crystallization from ethyl acetate gave 85 mg of the title compound as white, fluffy crystals, mp 238.6-239.8° C.

Workup

  1. filtrationthe reaction mixture was filtered through a pad of CELITE
  2. filtrationfilter agent
  3. washThe pad was rinsed with methanol
  4. concentrationthe combined filtrates were concentrated under reduced pressure
  5. dissolutionThe residue was dissolved in H2O
  6. additionthe solution was made basic by the addition of concentrated aqueous NH4OH solution
  7. extractionThe aqueous solution was extracted with 10% MeOH/CH2Cl2 several times
  8. concentrationthe combined organic layers were concentrated under reduced pressure
  9. customChromatography (SiO2, 25-75% CMA/CHCl3) gave a white powder
  10. customCrystallization from ethyl acetate

Sources & evidence

ORD record
ord-276b4d50114e4e6e99989dd2d2336433
Source dataset
uspto-grants-2011_05
Patent number
US07943609B2

Reaction notes

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