Water → tert-butyl 8-(1-cyclohexylethoxy)-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate

HRID 2191296Notes

Reaction equation

HRID 2191296 reaction equation
[CH:1]1([CH:7]([OH:9])[CH3:8])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[H-].[Na+].Cl[C:13]1[CH:14]=[CH:15][C:16]2[CH2:17][N:18]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:19][CH2:20][O:21][C:22]=2[N:23]=1.O>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1>[CH:1]1([CH:7]([O:9][C:13]2[CH:14]=[CH:15][C:16]3[CH2:17][N:18]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:19][CH2:20][O:21][C:22]=3[N:23]=2)[CH3:8])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

8

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 1378291-CyclohexylethanolHCID 57356939Tert-butyl 8-chloro-2,3-dihydropyrido[3,2-F][1,4]oxazepine-4(5H)-carboxylate

Product 1

HCID 68429333tert-butyl 8-(1-cyclohexylethoxy)-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylateYield 74.1%

Reagents, catalysts & solvents 3

HCID 634876Binap, (A+-)-CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolvent2×

Conditions

Temperature
100 °C

Procedure

To a solution of 1-cyclohexylethanol (0.23 g) in toluene (4 mL) was added sodium hydride (0.14 g), and the resulting mixture was stirred at 100° C. for 15 min under a nitrogen atmosphere. A mixture of tert-butyl 8-chloro-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate (0.50 g), BINAP (0.033 g), Pd2(dba)3 (0.024 g) and toluene (4 mL) was added, and the resulting mixture was stirred at 100° C. for 2 hr under an argon atmosphere. The reaction solution was poured into water, and the resulting product was extracted with ethyl acetate. The organic layer was washed with water and saturated brine and dried, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (solvent gradient; 0→40% ethyl acetate/hexane) to give tert-butyl 8-(1-cyclohexylethoxy)-2,3-dihydropyrido[3,2-f][1,4]oxazepine-4(5H)-carboxylate (0.49 g, 74%) as a yellow oil.

Workup

  1. additionwas added
  2. stirringthe resulting mixture was stirred at 100° C. for 2 hr under an argon atmosphere
  3. extractionthe resulting product was extracted with ethyl acetate
  4. washThe organic layer was washed with water and saturated brine
  5. customdried
  6. customthe solvent was evaporated under reduced pressure
  7. customThe residue was purified by silica gel column chromatography (solvent gradient; 0→40% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-6e098691b1cd43998d55ffe46621233c
Source dataset
uspto-grants-2012_12
Patent number
US08329687B2

Reaction notes

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