Dimethyl Sulfoxide → (S)-7-bromo-3-(neopentyloxy)-2',6'-dihydrospiro[chromeno[2,3-c]pyridine-5,3'-[1,4]oxazin]-5'-amine

HRID 455666Notes

Reaction equation

HRID 455666 reaction equation
[CH3:1][C:2]([CH3:6])([CH3:5])[CH2:3][OH:4].CS(C)=O.[H-].[Na+].[Br:13][C:14]1[CH:15]=[C:16]2[C@:27]3([N:32]=[C:31]([NH2:33])[CH2:30][O:29][CH2:28]3)[C:26]3[CH:25]=[C:24](Cl)[N:23]=[CH:22][C:21]=3[O:20][C:17]2=[CH:18][CH:19]=1>O.CCOC(C)=O.[Cl-].[Na+].O>[Br:13][C:14]1[CH:15]=[C:16]2[C@:27]3([N:32]=[C:31]([NH2:33])[CH2:30][O:29][CH2:28]3)[C:26]3[CH:25]=[C:24]([O:4][CH2:3][C:2]([CH3:6])([CH3:5])[CH3:1])[N:23]=[CH:22][C:21]=3[O:20][C:17]2=[CH:18][CH:19]=1

Participants

8

Reactant 4

HCID 679Dimethyl SulfoxideHCID 6404Neopentyl alcoholHCID 24758Sodium hydrideHCID 58465879(S)-7-bromo-3-chloro-2',6'-dihydrospiro[chromeno [2,3-c]pyridine-5,3'-[1,4]oxazin]-5'-amine2×

Product 1

HCID 67440039(S)-7-bromo-3-(neopentyloxy)-2',6'-dihydrospiro[chromeno[2,3-c]pyridine-5,3'-[1,4]oxazin]-5'-amine

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 57417360Sodium chloride; waterSolvent

Procedure

A vial was charged with 2,2-dimethylpropan-1-ol (100 mg, 1.130 mmol) and DMSO (1130 μL) to give a clear solution. Sodium hydride (60% in mineral oil; 45.2 mg, 1.130 mmol) was added and the vial was placed in a 100° C. oil bath for 5 min, then was removed from the heat and cooled to RT. (S)-7-bromo-3-chloro-2′,6′-dihydrospiro[chromeno[2,3-c]pyridine-5,3′-[1,4]oxazin]-5′-amine (Intermediate 1B, 86 mg, 0.226 mmol) was added to give an orange solution. The vial was sealed and heated in a 100° C. oil bath for 2 h. The mixture was cooled to room temperature, then diluted with water and EtOAc. Brine was added and the layers were separated. The aq. layer was extracted with EtOAc (2×). The combined organic extracts were dried over sodium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica gel (0-100% EtOAc/Hexane) to give (S)-7-bromo-3-(neopentyloxy)-2′,6′-dihydrospiro[chromeno[2,3-c]pyridine-5,3′-[1,4]oxazin]-5′-amine as a light-yellow solid.

Workup

  1. customto give a clear solution
  2. customwas placed in a 100° C.
  3. customfor 5 min
  4. customwas removed from the
  5. temperatureheat
  6. customto give an orange solution
  7. customThe vial was sealed
  8. temperatureheated in a 100° C. oil bath for 2 h
  9. temperatureThe mixture was cooled to room temperature
  10. customthe layers were separated
  11. extractionThe aq. layer was extracted with EtOAc (2×)
  12. dry with materialThe combined organic extracts were dried over sodium sulfate
  13. filtrationfiltered
  14. concentrationconcentrated
  15. customThe residue was purified by chromatography on silica gel (0-100% EtOAc/Hexane)

Sources & evidence

ORD record
ord-1b46f17c96ab489198e19403da21534c
Source dataset
uspto-grants-2013_07
Patent number
US08497264B2

Reaction notes

Loading…