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

HRID 2370836Notes

Reaction equation

HRID 2370836 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-852f2fa061374db8a45fd4f0f592b427
Source dataset
uspto-grants-2014_04
Patent number
US08710043B2

Reaction notes

Loading…