Tributylvinyltin → 2-(Benzyloxy)-3-nitro-6-vinylpyridine

HRID 509396Notes

Reaction equation

HRID 509396 reaction equation
[CH2:1]([O:8][C:9]1[C:14]([N+:15]([O-:17])=[O:16])=[CH:13][CH:12]=[C:11](Cl)[N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH:19]([Sn](CCCC)(CCCC)CCCC)=[CH2:20]>C1(C)C=CC=CC=1.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>[CH2:1]([O:8][C:9]1[C:14]([N+:15]([O-:17])=[O:16])=[CH:13][CH:12]=[C:11]([CH:19]=[CH2:20])[N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 2

HCID 81998TributylvinyltinHCID 225652672-(Benzyloxy)-6-chloro-3-nitropyridine

Product 1

HCID 866879862-(Benzyloxy)-3-nitro-6-vinylpyridine

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Conditions

Temperature
110 °C

Procedure

To a stirred mixture of (2-(benzyloxy)-6-chloro-3-nitropyridine (3.2 g, 0.0123 mol) in toluene (32.5 mL) in a 250 mL sealed tube, were added Pd(PPh3)4 (426 mg, 0.000369 mol, Aldrich) and vinyl tributyltin (3.90 g, 0.0123 mol). The tube was purged with the argon gas for 10 min, capped and stirred for 12 h at 110° C. After completion of the reaction (monitored by TLC, 10% EtOAc in hexane), the reaction mixture was quenched with water (20 mL) and extracted with EtOAc (50 mL×3). The organic layers were combined, dried over anhydrous sodium sulfate, and purified by column chromatography, silica gel (60-120 mesh) using 5-7% EtOAc in petroleum ether as an eluent to afford the title compound as a white solid. 1H NMR (400 MHz, DMSO-d6) δ: 8.47 (d, J=8.1 Hz, 1H), 7.52 (d, J=6.9 Hz, 1H), 7.43-7.27 (m, 3H), 7.20 (br. s., 2H), 6.92-6.83 (m, 1H), 6.49 (dd, J=17.4, 1.5 Hz, 1H), 5.74 (dd, J=10.5, 1.5 Hz, 1H), 5.59 (s, 2H). MS (ESI, positive ion) m/z: 257 (M+H).

Workup

  1. customsealed tube
  2. customThe tube was purged with the argon gas for 10 min
  3. customcapped
  4. customAfter completion of the reaction (monitored by TLC, 10% EtOAc in hexane)
  5. customthe reaction mixture was quenched with water (20 mL)
  6. extractionextracted with EtOAc (50 mL×3)
  7. dry with materialdried over anhydrous sodium sulfate
  8. custompurified by column chromatography, silica gel (60-120 mesh)

Sources & evidence

ORD record
ord-35d599dc18b247bb8adc25dcf0b23c6a
Source dataset
uspto-grants-2015_08
Patent number
US09096527B2

Reaction notes

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