Construction of <i>N</i>-Alkyl- and <i>N</i>-Arylaziridines from Unprotected Amines via C–H Oxidative Amination Strategy
作者:Yang Yu、Meijuan Li、Yong Zhang、Yonghai Liu、Lei Shi、Wei Wang、Hao Li
DOI:10.1021/acs.orglett.8b03799
日期:2019.2.15
A copper-promoted intramolecular C–H oxidative amination reaction between secondary amine (N–H) and C(sp3)–H at the benzylic position of azaarenes or α-position of ketones for the synthesis of aziridine derivatives has been developed. Moreover, a practical annulation of electron-deficient vinylarenes with an unprotected primary alkyl amine by a Yb(OTf)3–CuI relay system has also been reported. The
Syntheses of aza and fluorine-substituted 3-(piperidin-4-yl)-4,5-dihydro-1H-benzo[d][1,3]diazepin-2(3H)-ones
作者:Xiaojun Han、Rita L. Civiello、Stephen E. Mercer、John E. Macor、Gene M. Dubowchik
DOI:10.1016/j.tetlet.2008.11.012
日期:2009.1
A practical and expedient synthesis of the title compounds is described. They were prepared by Stille reaction of nitro halopyridines 4 or nitro fluro-halobenzenes 10, followed by Michaeladdition of tert-butyl 4-aminopiperidine-1-carboxylate to the resulting activated vinyl compounds 5 and 11, hydrogenation (–NO2→–NH2), cyclic urea formation, Boc removal, and HCl salt formation. However, N3 and F1