| 摘要 |
Compounds of the formulaare disclosed, wherein R1, represents secondary alkyl; aralkyl; cycloalkyl; heteroaryl substituted alkyl; norbornyl; and substituted secondary alkyl, aralkyl, cycloalkyl, heteroaryl substituted alkyl, norbornyl; and para-substituted phenyl groups; and R2 and R3 are hydrogen or pharmacologically acceptable acyl groups. The compounds of the invention are useful as cardiovascular vasodilator or anti-hypertensive agents. The therapeutically useful compounds of the invention as well as similar 5-N and N-6 substituted adenosine 5-uronamides are prepared, in accordance with a novel process, from isopropylidene (or otherwise suitably blocked) inosine-5'-uronic acid. Isopropylideneinosine-5'-uronic acid is reacted with a suitable inorganic acid halide, such as thionyl chloride, to yield 6-halogeno-9-[2',3'-O-isopropylidene-beta-D-ribofuranosyl-5-uronic acid halide]-9H-purine. This intermediate is reacted with an amine of the general formula R4R5NH to give a 6-halogeno substituted, substituted uronic acid amide of the formulawherein X is halogen. Reaction of the latter intermediate with an amine of the formula R1-NH2, and removal of the isopropylidene (or other) blocking groups yields the compounds of the invention. |
