N-6 alkyl substituted adenosine derivatives as cardiac vasodilators.

摘要

New, N-6 monosubstituted adenosine derivatives are disclosed which have significant cardiac vasodilatory effect. The compounds of the invention include 6-(cyclo-butyl amino) - 9 - ( beta -D-ribofuranosyl) - 9H - purine, 6 - (2 - methyl - 2 phenyl hydrazino) - 9 - ( beta -D-ribofuranosyl) - 9H - purine, and compounds of the general formula: <CHEM> wherein R1 is H, lower alkyl, lower alkoxy, alkylamino, or arylamino, R2 is H, lower alkyl, hydroxymethyl, phenyl or substituted phenyl, R3 is H. lower alkyl, phenyl, substituted phenyl, R3, is H, lower alkyl, phenyl, substituted phenyl, 2- or 3-thienyl, or 2- or 3-pyridyl, R4 is H or lower alkyl, and R5 is H or lower acyl. Particularly active as a cardiac vasodilator is the compound (-) - 6 - (R - 1 - phenyl - 2-butyl amino) - 9 - (( beta -D-ribofuranosyl) - 9H - purine.