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A series of triesters of adenosine cyclic 3',5'-phosphate was synthesized by treatment of the free acid with various diazoalkanes (R=H, CH3, C6H5,0-NO2C6H4, p-NO2C6H4, p-CH3C6H4). The resulting diastereomeric mixtures were separated into their axial and equatorial components. Hydrolysis of the compounds was examined as well as photolysis of the photolabile o-nitrobenzyl ester. All compounds were then tested for their ability to activate the cAMP-dependent protein kinase and for their ability to serve as a substrate for the cAMP phosphodiesterase showing almost no effect on either enzyme. In a biological assay the benzyl triesters were able to penetrate into C 6 rat glioma cells and to induce the typical morphological alteration of the cell shape known for high cellular levels of cAMP. It was concluded that the benzyl triesters of cAMP are useful derivatives which can be efficiently and specifically converted to the parent nucleotide. Benzyl derivatives of biologically active phosphodiesters may provide a useful tool for study in biology and pharmacology.
J Engels, and
E J Schlaeger
January 1968,
Science (New York, N.Y.),
J Engels, and
E J Schlaeger
April 1979,
Chemical & pharmaceutical bulletin,
J Engels, and
E J Schlaeger
January 1974,
Methods in enzymology,
J Engels, and
E J Schlaeger
December 1991,
Chemical & pharmaceutical bulletin,
J Engels, and
E J Schlaeger
February 1981,
Biochemistry,
J Engels, and
E J Schlaeger
August 1973,
Biochemical and biophysical research communications,
J Engels, and
E J Schlaeger
February 1977,
Biochemistry,
J Engels, and
E J Schlaeger
December 1969,
Lyon medical,
J Engels, and
E J Schlaeger
January 1977,
Archivum immunologiae et therapiae experimentalis,
J Engels, and
E J Schlaeger
November 1990,
Chemical & pharmaceutical bulletin,
