Synthesis of 3-hydroxy-2- and -4-pyridone nucleosides as potential antitumor agents
摘要:
The ribo- and arabinofuranosyl nucleosides of antitumor active 2- and 4-pyridones 1a and 2a were prepared by direct condensation of the silylated bases with either 1-O-acetyl-2,3,5-tri-O-benzoyl-D-ribofuranose (4a) or 2,3,5-tri-O-benzyl-1-p-nitrobenzoyl-D-arabinofuranose (7) in the presence of trimethylsilyl triflate (Me3SiOTf). In the case of the arabinofuranosyl nucleosides, separation of the alpha and beta anomers was accomplished at the stage of O-benzyl-protected compounds (8b + 9b, and 10b + 11b) after chemical functionalization of the 3-hydroxy group of the pyridone aglycons with acetyl and benzyl groups, respectively. Deblocking of the protected ribo- and arabinofuranosyl nucleosides was performed by the standard methods. In vitro activity against P-388 cells in culture indicated that the 4-pyridone riboside 6d was the most active member of the series with a twofold lower ID50 than the parent pyridone 2a. However, this and all the other compounds tested in this series showed no activity against the in vivo model system of murine P-388 leukemia at doses ranging from 25 to 400 mg/kg qd 1-5.
Synthesis of 2-Alkyl-3-hydroxy-4-pyridinone-ribonucleosides, Potential Oral Iron Chelators
摘要:
Several ribonucleosides, named 2-alkyl-3-hydroxy-1-(beta-D-ribofuranosyl or pyranosyl)-4-pyridinones, were synthesized in good yield. The method provides a useful means to obtain alpha-ketohydroxypyridin derivatives with different sugar moieties that, if used as drugs, might enhance their absorption from the intestine and certain other desirable pharmacological properties.
Synthesis of 3-hydroxy-2- and -4-pyridone nucleosides as potential antitumor agents
作者:David T. Mao、John S. Driscoll、Victor E. Marquez
DOI:10.1021/jm00368a010
日期:1984.2
The ribo- and arabinofuranosyl nucleosides of antitumor active 2- and 4-pyridones 1a and 2a were prepared by direct condensation of the silylated bases with either 1-O-acetyl-2,3,5-tri-O-benzoyl-D-ribofuranose (4a) or 2,3,5-tri-O-benzyl-1-p-nitrobenzoyl-D-arabinofuranose (7) in the presence of trimethylsilyl triflate (Me3SiOTf). In the case of the arabinofuranosyl nucleosides, separation of the alpha and beta anomers was accomplished at the stage of O-benzyl-protected compounds (8b + 9b, and 10b + 11b) after chemical functionalization of the 3-hydroxy group of the pyridone aglycons with acetyl and benzyl groups, respectively. Deblocking of the protected ribo- and arabinofuranosyl nucleosides was performed by the standard methods. In vitro activity against P-388 cells in culture indicated that the 4-pyridone riboside 6d was the most active member of the series with a twofold lower ID50 than the parent pyridone 2a. However, this and all the other compounds tested in this series showed no activity against the in vivo model system of murine P-388 leukemia at doses ranging from 25 to 400 mg/kg qd 1-5.
Synthesis of 2-Alkyl-3-hydroxy-4-pyridinone-ribonucleosides, Potential Oral Iron Chelators
作者:Gang Liu、Fred W. Bruenger、Amy M. Barrios、Scott C. Miller
DOI:10.1080/15257779508010712
日期:1995.11
Several ribonucleosides, named 2-alkyl-3-hydroxy-1-(beta-D-ribofuranosyl or pyranosyl)-4-pyridinones, were synthesized in good yield. The method provides a useful means to obtain alpha-ketohydroxypyridin derivatives with different sugar moieties that, if used as drugs, might enhance their absorption from the intestine and certain other desirable pharmacological properties.