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Volumn , Issue 20, 2006, Pages 3492-3494

A stereoselective synthesis of (E)-α-stannylvinyl sulfones via palladium-catalyzed hydrostannylation of acetylenic sulfones

Author keywords

(E) stannylvinyl sulfone; Acetylenic sulfone; Hydrostannylation; Palladium; Stereoselective synthesis

Indexed keywords

ACETYLENE DERIVATIVE; ALPHA STANNYLVINYL SULFONE DERIVATIVE; BENZENE; PALLADIUM; SULFONE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 33846513441     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2006-958432     Document Type: Article
Times cited : (13)

References (35)
  • 25
    • 33846543158 scopus 로고    scopus 로고
    • Typical Procedure for Hydrostannylation Reaction. A 25-mL, two-necked round-bottomed flask equipped with a magnetic stir bar and argon was charged sequentially with 1-butyl-2-(phenylsulfonyl)ethyne (1a, 1 mmol, benzene (4 mL, Pd(PPh3)4 (0.01 mmol) and Bu3SnH (1.05 mmol, The mixture was stirred at r.t. for 4 h. After removal of the solvent under reduced pressure, the residue was diluted with light PE (20 mL) and filtered to remove the palladium catalyst. The resulting solution was concentrated under vacuum and the residue was purified by flash chromatography on silica gel eluting with light PE. Selected spectral and analytical data for 2a: yield 0.462 g (90, 1H NMR (400 MHz, CDCl3, δ, 7.86-7.84 (m, 2 H, 7.56-7.48 (m, 3 H, 6.28 (t, J, 7.2 Hz, 1 H, 2.40-2.36 (m, 2 H, 1.56-1.48 (m, 6 H, 1.38-1.29 (m, 6 H, 1.22-1.15 (m, 4 H, 1.11-1.06 (m, 6 H, 0.90 (t, J, 7.2 Hz, 9 H, 0.80 (t, J, 7.2 Hz, 3 H) ppm
    • 3): δ = 157.4, 149.0, 143.5, 132.5, 128.8, 127.1, 31.0, 30.6, 28.8, 27.3, 22.3, 13.8, 13.7, 11.4 ppm.
  • 35
    • 33846494113 scopus 로고    scopus 로고
    • Typical Procedure for Stille Coupling Reaction, E)-1-(Tributylstannyl)-1-(phenylsulfonyl)-1-hexene (2a, 1 mmol) and allyl bromide 3a (1.1 mmol) were dissolved in DMF (10 mL) under Ar at r.t. The compounds Pd(PPh3)4 (0.05 mmol) and CuI (0.75 mmol) were then added. The mixture was stirred at r.t. and monitored by TLC for the disappearance of the starting organostannane. Then it was diluted with Et2O (40 mL) and the organic layer was washed with aq NH4Cl (10 mL) and H2O (20 mL, and dried over MgSO4. The solvent was removed under reduced pressure and the residue purified by column chromatography on silica gel eluting with a mixture of Et2O and light PE (1:6, Selected spectral and analytical data for 4a: yield 0.219 g (83, 1H NMR (400 MHz, CDCl3, δ, 7.90-7.87 (m, 2 H, 7.61-7.51 (m, 3 H, 6.03 (t, J, 7.6 Hz, 1 H, 5.73-5.63 (m, 1 H, 5.11-5.04 (m, 2 H, 3.08-3.06 (m, 2 H, 2.68-2.60 (m, 2 H, 1.37-1.25 m, 4 H, 0
    • 3): δ = 144.5, 141.5, 138.9, 134.3, 133.2, 129.1, 127.4, 118.0, 36.8, 31.3, 28.4, 22.3, 13.9 ppm.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.