4-Tributylstannyl-3,6-dihydro-2H-pyran → 8-(4-(3,6-dihydro-2H-pyran-4-yl)-6-(4-nitrophenyl)-1,3,5-triazin-2-yl)-3-oxa-8-azabicyclo[3.2.1]octane

HRID 404486Notes

Reaction equation

HRID 404486 reaction equation
Cl[C:2]1[N:7]=[C:6]([C:8]2[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=2)[N:5]=[C:4]([N:17]2[CH:22]3[CH2:23][CH2:24][CH:18]2[CH2:19][O:20][CH2:21]3)[N:3]=1.C([Sn](CCCC)(CCCC)[C:30]1[CH2:31][CH2:32][O:33][CH2:34][CH:35]=1)CCC>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1(C)C=CC=CC=1>[O:33]1[CH2:32][CH:31]=[C:30]([C:2]2[N:7]=[C:6]([C:8]3[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=3)[N:5]=[C:4]([N:17]3[CH:22]4[CH2:23][CH2:24][CH:18]3[CH2:19][O:20][CH2:21]4)[N:3]=2)[CH2:35][CH2:34]1

Participants

5

Reactant 2

HCID 222522584-Tributylstannyl-3,6-dihydro-2H-pyran2×HCID 866365228-(4-Chloro-6-(4-nitrophenyl)-1,3,5-triazin-2-yl)-3-oxa-8-azabicyclo[3.2.1]octane

Product 1

HCID 670219658-(4-(3,6-dihydro-2H-pyran-4-yl)-6-(4-nitrophenyl)-1,3,5-triazin-2-yl)-3-oxa-8-azabicyclo[3.2.1]octaneYield 86%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalyst2×HCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

A microwave vial was charged with 8-(4-chloro-6-(4-nitrophenyl)-1,3,5-triazin-2-yl)-3-oxa-8-azabicyclo[3.2.1]octane (0.440 g, 1.27 mmoles). Toluene (6 mL) was then added and the solution was sparged with nitrogen for 10 minutes. Tetrakis(triphenylphosphine)palladium(0) (0.088 g, 0.076 mmol) and tributyl(3,6-dihydro-2H-pyran-4-yl)stannane (0.567 g, 1.52 mmol) were added. The vial was sealed and heated to 100° C. for 40 minutes via microwave. Additional tributyl(3,6-dihydro-2H-pyran-4-yl)stannane (0.283 g, 0.76 mmoles) and tetrakis(triphenylphosphine)palladium(0) (0.022 g, 0.019 mmol) were added and the suspension was heated to 110° C. by microwave for additional 90 minutes. The suspension was then cooled to room temperature and filtered through Celite™. The filter cake was washed with ethyl acetate and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel chromatography, eluting with 0-2% methanol in methylene chloride, to provide 8-(4-(3,6-dihydro-2H-pyran-4-yl)-6-(4-nitrophenyl)-1,3,5-triazin-2-yl)-3-oxa-8-azabicyclo[3.2.1]octane (0.430 g, 86%) as a light yellow solid. HRMS 396.1666 (M+H, calc.), 396.1668 (M+H, obs.).

Workup

  1. customthe solution was sparged with nitrogen for 10 minutes
  2. customThe vial was sealed
  3. temperaturethe suspension was heated to 110° C. by microwave for additional 90 minutes
  4. temperatureThe suspension was then cooled to room temperature
  5. filtrationfiltered through Celite™
  6. washThe filter cake was washed with ethyl acetate
  7. concentrationthe filtrate was concentrated under reduced pressure
  8. customThe crude product was purified by silica gel chromatography
  9. washeluting with 0-2% methanol in methylene chloride

Sources & evidence

ORD record
ord-896bd1ba154f450283b29276451dd4d4
Source dataset
uspto-grants-2014_06
Patent number
US08748421B2

Reaction notes

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