Water → (11S)-11-[(benzyloxy)methyl]-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinolin-6-amine

HRID 1035536Notes

Reaction equation

HRID 1035536 reaction equation
[CH2:1]([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]([O-])=[CH:18][C:17]=3[N:27]=[C:14]2[CH2:13][O:12][CH2:11]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH4+:28].[OH-].C1(C)C=CC(S(Cl)(=O)=O)=CC=1.O>C(Cl)Cl>[CH2:1]([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]([NH2:28])[C:17]=3[N:27]=[C:14]2[CH2:13][O:12][CH2:11]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 962WaterHCID 73974-Toluenesulfonyl chlorideHCID 14923Ammonium HydroxideHCID 67156190(11S)-11-[(benzyloxy)methyl]-10,11-dihydro-8H-[1,4]oxazino[4',3':1,2]imidazo[4,5-c]quinoline 5-oxide

Product 1

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

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

(11S)-11-[(benzyloxy)methyl]-10,11-dihydro-8H-[1,4]oxazino[4′,3′:1,2]imidazo[4,5-c]quinoline 5-oxide (0.96 g, 2.67 mmol) was dissolved in 25 mL of CH2Cl2 and treated with 2.5 mL of concentrated aqueous NH4OH solution. The mixture was stirred rapidly and then p-toluenesulfonyl chloride (0.51 g, 2.67 mmol) was carefully added. Rapid stirring was continued for 2.5 hours. The reaction mixture was then treated with 50 mL of CH2Cl2 and 25 mL of H2O. The layers were separated and the organic portion was washed successively with 5% Na2CO3 solution (3×25 mL), H2O and brine. The organic portion was dried over Na2SO4, filtered and concentrated under reduced pressure. Chromatography (SiO2, 15-25% CMA/CHCl3) gave a light-brown foam. Crystallization from ethyl acetate and a small amount of methanol gave (11S)-11-[(benzyloxy)methyl]-10,11-dihydro-8H-[1,4]oxazino[4′,3′:1,2]imidazo[4,5-c]quinolin-6-amine (420 mg) fine white needles, mp 184.6-186.2° C.

Workup

  1. stirringRapid stirring
  2. customThe layers were separated
  3. washthe organic portion was washed successively with 5% Na2CO3 solution (3×25 mL), H2O and brine
  4. dry with materialThe organic portion was dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customChromatography (SiO2, 15-25% CMA/CHCl3) gave a light-brown foam
  8. customCrystallization from ethyl acetate

Sources & evidence

ORD record
ord-cbd984d995f6481b802995f0e9df9fa7
Source dataset
uspto-grants-2013_10
Patent number
US08546383B2

Reaction notes

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