Synthesis of fused pyridopyrrolidine dione derivatives using hetero Diels–Alder reactions
作者:Helen J Mason、Ximao Wu、Rebecca Schmitt、John E Macor、Guixue Yu
DOI:10.1016/s0040-4039(01)02000-7
日期:2001.12
Hetero Diels-Alder reactions of heteroaromatic amidines and maleimide afforded novel fused pyridopyrrolidine dione scaffolds in moderate to good yields under mild conditions. (C) 2001 Elsevier Science Ltd. All rights reserved.
Substituted Pyrazolopyridopyridazines as Orally Bioavailable Potent and Selective PDE5 Inhibitors: Potential Agents for Treatment of Erectile Dysfunction
作者:Guixue Yu、Helen Mason、Ximao Wu、Jian Wang、Saeho Chong、Bruce Beyer、Andrew Henwood、Ronald Pongrac、Laurie Seliger、Bin He、Diane Normandin、Pam Ferrer、Rongan Zhang、Leonard Adam、William G. Humphrey、John Krupinski、John E. Macor
DOI:10.1021/jm0256068
日期:2003.2.1
potent and selectivePDE5inhibitors. Compound 6 has been identified as a more potent and selectivePDE5inhibitor than sildenafil (1). It is as efficacious as sildenafil in in vitro and in vivo PDE5 inhibition models, and it is orally bioavailable in rats and dogs. The superior isozyme selectivity of 6 is expected to exert less adverse effects in humans when used for erectiledysfunctiontreatment.