AbstractA simple and efficient protocol for the preparation of N 7-substituted adenines, guanines, and 6-mercaptopurines is described. The key step is the regioselective preparation of 7-substituted 6-chloropurines which are building blocks for the divergent synthesis of adenines, guanines, and 6-mercaptopurines by known procedures. Graphical abstract
Synthesis and structure-activity relationship of 6-substituted purine derivatives as novel selective positive inotropes
作者:Jeffery B. Press、Robert Falotico、Zoltan G. Hajos、Rebecca Anne Sawyers、Ramesh M. Kanojia、Louella Williams、Barbara Haertlein、Jack A. Kauffman、Constance Lakas-Weiss、Joseph J. Salata
DOI:10.1021/jm00102a001
日期:1992.11
A series of purine derivatives was prepared and examined for selective inotropic activity in vitro and in vivo. Thioether-linked derivatives were superior to their oxygen and nitrogen isosteres. Substitution of electron-withdrawing groups on the benzhydryl moiety of these agents increased potency. The best compound of the study, 17 (carsatrin), was examined further and demonstrated selective oral activity as a positive inotrope. These compounds are presumed to act by affecting the kinetics of the cardiac sodium channel by analogy to the prototypic agent DPI 201106 (1). Their high selectivity for increasing contractile force and dP/dt without affecting blood pressure or heart rate is consistent with this mechanism. Carsatrin (17) was selected as a potential development candidate.
Chemoselective Perfluoromethylation of Thio- and Selenoamides
作者:Xianhong Xu、Jianyu Zhang、Tao Xu
DOI:10.1021/acs.orglett.0c03241
日期:2020.11.6
A chemo- and regioselective perfluoromethylation using thioamides/selenoamides (prepared one step from corresponding lactams) as starting materials has been discovered. The reaction demonstrated complementary chemoselectivity to the C-H trifluoromethylation of (hetero)arenes as well as remarkable functional group compatibility especially toward radical sensitive olefin-, alkyne-, and arylhalide-bearing substrates. The examples of perfluorothio-/selenolated drug molecules indicated application potential of this strategy in drug modification and drug-analogue preparation.