An approach to an asymmetric synthesis of carbocyclic sinefungin (cSF) 2 is proposed. The sequence, which uses an original radical based chemistry for C-C bond formation, led to the immediate precursor 18 of the protected desired compound. While the overall yield is modest, it is noticeable that only a limited number of steps are needed to obtain the target compound.
The invention of radical reactions. Part XXV. A convenient method for the synthesis of the acyl derivatives of N-hydroxypyridine-2-thione
作者:Derek H.R. Barton、Mohammad Samadi
DOI:10.1016/s0040-4020(01)88249-1
日期:1992.1
Treatment of the readily available di-N-oxide- of 2-thiopyridine disulfide 6 with tributylphosphine in the presence of a carboxylic acid provides a convenient and high yielding synthesis of the acyl derivatives 2 of N-hydroxy-2-thio-pyridone. Application of this procedure to the acids 17 and 18 gave, after irradiation in the presence of t-butylthiol, the desired decarboxylated derivatives in high (>90%)
Total Synthesis of the Thymidine Analogue of Sinefungin
作者:Derek H. R. Barton、Stephan D. Gero、Guillerm Negron、Béatrice Quiclet-Sire、Mohammad Samadi、Claire Vincent
DOI:10.1080/15257779508009744
日期:1995.10
The carbon skeleton of ''Sinethymidin'' 4 was constructed by two radical coupling reaction. The first step was a coupling of the radical derived from 2 and the unsaturated amide 5. The olefin 6 thus obtained was added to the radical derived from the known N-hydroxy-2-thiopyridinone aspartic ester. ''Sinethymidin'', tested for its antileismanial effect, was devoid of activity.
BARTON, DEREK H. R.;GERO, STEPHANE D.;QUICLET-SIRE, BEATRICE;SAMADI, MOHA+, J. CHEM. SOC. PERKIN TRANS. 1,(1991) N, C. 981-985
作者:BARTON, DEREK H. R.、GERO, STEPHANE D.、QUICLET-SIRE, BEATRICE、SAMADI, MOHA+
DOI:——
日期:——
A Synthetic Approach to Carbocyclic Sinefungin
作者:Adilson D. Da Silva、Edmilson JoseMaria、Pierre Blanchard、Jean-Louis Fourrey、Malka Robert-Gero
DOI:10.1080/07328319808004308
日期:1998.12
An approach to an asymmetric synthesis of carbocyclic sinefungin (cSF) 2 is proposed. The sequence, which uses an original radical based chemistry for C-C bond formation, led to the immediate precursor 18 of the protected desired compound. While the overall yield is modest, it is noticeable that only a limited number of steps are needed to obtain the target compound.
Barton, Derek H. R.; Gero, Stephane D.; Quiclet-Sire, Beatrice, Journal of the Chemical Society. Perkin transactions I, 1991, # 5, p. 981 - 985
作者:Barton, Derek H. R.、Gero, Stephane D.、Quiclet-Sire, Beatrice、Samadi, Mohammed