A Metal-Free Tandem Demethylenation/C(sp<sup>2</sup>)–H Cycloamination Process of <i>N</i>-Benzyl-2-aminopyridines via C–C and C–N Bond Cleavage
作者:Dongdong Liang、Yimiao He、Lanying Liu、Qiang Zhu
DOI:10.1021/ol4015656
日期:2013.7.5
A mild, metal-free synthesis of pyrido[1,2-a]benzimidazoles starting with N-benzyl-2-aminopyridines, which employs PhI(OPiv)2 as a stoichiometric oxidant, has been developed. The process is initiated by an unusual PhI(OPiv)2-mediated ipso SEAr reaction, followed by solvent-assisted C–C and C–N bond cleavage.
已经开发了一种轻度,无金属的合成方法,该方法以N-苄基-2-氨基吡啶为原料,以PhI(OPiv)2为化学计量氧化剂,合成了吡啶并[1,2- a ]苯并咪唑类化合物。该过程由一个不寻常的岛(OPiv)发起2介导的本位小号ë的Ar反应,接着进行溶剂辅助C-C和C-N键断裂。
Mesoionic pyrido[1,2- a ]pyrimidinones: Discovery of triflumezopyrim as a potent hopper insecticide 1
作者:Wenming Zhang、Caleb W. Holyoke、Thomas F. Pahutski、George P. Lahm、James D. Barry、Daniel Cordova、Robert M. Leighty、Vineet Singh、Daniel R. Vicent、My-Hanh T. Tong、Kenneth A. Hughes、Stephen F. McCann、Yewande T. Henry、Ming Xu、Twyla A. Briddell
DOI:10.1016/j.bmcl.2016.11.042
日期:2017.1
A novel class of mesoionic pyrido[1,2-a]pyrimidinones has been discovered with exceptional insecticidal activity controlling a number of insect species. In this communication, we report the part of the optimization program which led to the discovery of triflumezopyrim as a highly potent insecticide controlling various hopper species. Our efforts in discovery, synthesis, structure-activity relationship