This report describes the detailed conformational analysis and synthesis of a series of phthalazine phosphodiesterase-type (IV)(PDE IV) inhibitors bearing either mono-or dichloro 4-methylenepyridine at the 'down'position of the phthalazine nucleus or different heterocycles at the 'top'position 4 of the phthalazine moiety. Both the mono-and dichloro 4- methylenepyridine units linked at carbon C1 of the phthalazine nucleus show identical ...
[Jeff Thrasher; Hembre, Erik J.; Gardinier, Kevin M.; Savin, Kenneth A.; Hong, Jian Eric; Jungheim, Louis N. Heterocycles, 2006 , vol. 67, # 2 p. 543 - 547]