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Volumn , Issue 2, 2009, Pages 225-228

Palladium(0)-catalyzed benzylation of H-phosphonate diesters: An efficient entry to benzylphosphonates

Author keywords

Benzylphosphonates; C phosphonates; H phosphonates; Palladium cross coupling

Indexed keywords


EID: 62349095379     PISSN: 09365214     EISSN: 14372096     Source Type: Journal    
DOI: 10.1055/s-0028-1087522     Document Type: Article
Times cited : (38)

References (48)
  • 8
    • 4243404632 scopus 로고
    • Houben-Weyl, Müller, E, Ed, George Thieme Verlag: Stuttgart
    • (b) Methoden der organischen Chemie (Houben-Weyl), Vol. XII/1; Müller, E., Ed.; George Thieme Verlag: Stuttgart, 1964, 433.
    • (1964) Methoden der organischen Chemie , vol.XII 1 , pp. 433
  • 11
    • 62349088314 scopus 로고
    • Houben-Weyl, Müller, E, Ed, George Thieme Verlag: Stuttgart
    • (b) Methoden der organischen Chemie (Houben-Weyl), Vol. XII/1; Müller, E., Ed.; George Thieme Verlag: Stuttgart, 1964, 446.
    • (1964) Methoden der organischen Chemie , vol.XII 1 , pp. 446
  • 37
    • 62349133919 scopus 로고    scopus 로고
    • Presence of water in the reaction mixture facilitated reduction of palladium(II) acetate and resulted in improved reproducibility of the reactions
    • Presence of water in the reaction mixture facilitated reduction of palladium(II) acetate and resulted in improved reproducibility of the reactions.
  • 40
    • 62349137847 scopus 로고    scopus 로고
    • Lower yields of diphenyl benzylphosphonate for the reactions of diphenyl H-phosphonate (Table 2, entries 9 and 10) were due to partial hydrolysis of the starting H-phosphonate under the reaction conditions.
    • Lower yields of diphenyl benzylphosphonate for the reactions of diphenyl H-phosphonate (Table 2, entries 9 and 10) were due to partial hydrolysis of the starting H-phosphonate under the reaction conditions.
  • 46
    • 62349139016 scopus 로고    scopus 로고
    • Typical Procedure for the Preparation of Dinucleoside Benzylphosphonates 2: Pd(OAc)2 (0.05 mmol, Xantphos (0.1 mmol, and N,N-diisopropylethylamine (mmol, were refluxed for ca. 3 h in degassed THF (5 mL) containing H2O (0.025 mmol, To this, separate diastereomers of dinucleoside H-phosphonate 1 (1a or 1b; 0.5 mmol),37 and benzyl bromide (0.75 mmol, dissolved in THF (2 mL, were added and the mixture was heated under reflux for 3 h. After concentration and partition of the reaction mixture between sat. aq NaHCO3 and CH2Cl2, the product was purified by silica gel column chromatography using a stepwise gradient of ethanol (0-5, in CH 2Cl2 containing triethylamine (0.02, Compounds 2 were obtained as off-white solids (purity >98, 1H NMR spectroscopy, Compound 2a: 83% yield from 1a probably RP diastereomer
    • 31P NMR spectroscopy.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.