162279-53-0Relevant academic research and scientific papers
Purine derivatives having phosphodiesterase iv inhibition activity
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, (2008/06/13)
Disclosed are compounds of the formula: whereinR3, R6a, R6b and R8 are substituted as disclosed herein. The compounds are effective in effecting PDE IV inhibition in patients in need thereof.
PURINE DERIVATIVES HAVING PHOSPHODIESTERASE IV INHIBITION ACTIVITY
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, (2008/06/13)
A compound of the formula: wherein R2 is O or S; R3, R6a and R8 are the same or different and each represent a C1-8 alkyl which is unbranched or branched and unsubstituted or substituted with OH, alkoxy, CO2H, =NOH, =NOCONH2, or =O; C3-8 cycloalkyl which is unsubstituted or substituted with OH, alkoxy, CO2H, =NOH, =NOCONH2, or =O; C4-8 cycloalkylalkyl wherein the cycloalkyl portion is unsubstituted or substituted with OH, alkoxy, CO2H, =NOH, =NOCONH2, or =O; aryl which is unsubstituted or substituted with Cl, NH2, alkylamino, dialkylamino, amido, C1-C8 alkylamido, C1-C3 dialkylamido, OH, alkoxy, HC=NOH, HC=NOCONH2, C1-C3 alkyl, phenyl or benzyl; aralkyl (C1-4); heterocyclyl; heterocyclylalkyl (C1-C4); and heteroaryl; R6b represents a H or R6a, or together R6b, N, and R6a make a 3 to 8 member ring containing at least one carbon, from one to three nitrogen atoms, from zero to two oxygen atoms, from zero to two sulfur atoms, said ring optionally substituted with alkoxy, CO2H, CONH2, =NOH, =NOCONH2, =O; and where aryl is phenyl or naphthyl, the heterocyclyl is a 5, 6 or 7 membered ring including from one to three nitrogen atoms, and from zero to two oxygen atoms, from zero to two sulfur atoms, and can be substituted as in aryl on the carbons or nitrogens of that ring; or a pharmaceutically acceptable salt thereof, provided that when R3 is propyl, R8 is not cyclopentyl, noradamantyl, or dicyclopropylmethyl.
