Hydrogen Peroxide → HCID 131729895, compound

HRID 886345Notes

Reaction equation

HRID 886345 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH:12]=[C:11]([C:14]2[CH:36]=[CH:35][C:17]3[C:18]4[N:22]([CH2:23][CH2:24][O:25][C:16]=3[CH:15]=2)[CH:21]=[C:20]([C:26]2[N:27]([CH:32]([CH3:34])[CH3:33])[N:28]=[C:29]([CH3:31])[N:30]=2)[N:19]=4)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].B.C1C[O:41]CC1.[OH-].[Na+].OO>COCCOCCOC.O>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][C@@H:11]([C:14]2[CH:36]=[CH:35][C:17]3[C:18]4[N:22]([CH2:23][CH2:24][O:25][C:16]=3[CH:15]=2)[CH:21]=[C:20]([C:26]2[N:27]([CH:32]([CH3:33])[CH3:34])[N:28]=[C:29]([CH3:31])[N:30]=2)[N:19]=4)[C@H:12]([OH:41])[CH2:13]1)=[O:7])([CH3:2])([CH3:4])[CH3:3]

Participants

7

Reactant 4

HCID 784Hydrogen PeroxideHCID 14798Sodium HydroxideHCID 2723981Borane;tetrahydrofuranHCID 58204712HCID 58204712, compound

Product 1

HCID 131729895HCID 131729895, compoundYield 74.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 8150DiglymeSolvent

Procedure

4-[2-(2-Isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (0.60 g, 1.22 mmol) was partially dissolved in dry diethyleneglycol dimethyl ether (14 mL) and a solution of borane/THF complex (1M in THF, 7.29 mL, 7.29 mmol) was added dropwise. After stirring briefly at room temperature, the mixture was allowed to stand for 16 h. The mixture was then cooled in ice, and water (1.1 mL), 2M sodium hydroxide (3.6 mL) and 35% hydrogen peroxide (0.94 mL, 8.98 mmol) were added dropwise in sequence. The mixture was heated at 50° C. for 8 h, then cooled, diluted with water (approximately 30 mL) and extracted three times with ethyl acetate. The combined organic extracts were dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0-10% methanol in DCM) to give racemic-trans-3-Hydroxy-4-[2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-piperidine-1-carboxylic acid tert-butyl ester (0.46 g, 74%), containing approx. 20% of 4-hydroxypiperidine isomer. LCMS RT=4.48, [M+H]+=509.

Workup

  1. temperatureThe mixture was then cooled in ice
  2. temperatureThe mixture was heated at 50° C. for 8 h
  3. temperaturecooled
  4. extractionextracted three times with ethyl acetate
  5. dry with materialThe combined organic extracts were dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-0ad3c5a16c584967bfc83b7618c3c4b6
Source dataset
uspto-grants-2012_08
Patent number
US08242104B2

Reaction notes

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