Palladium- and copper-catalyzed selective arylation of 5-aryltetrazoles by diaryliodonium salts
作者:Irina P. Beletskaya、Dmitri V. Davydov、Matvey S. Gorovoy
DOI:10.1016/s0040-4039(02)01325-4
日期:2002.8
Palladium(0)-catalyzed arylation of 5-aryltetrazoles in t-BuOH at 80°C with diaryliodoniumsalts proceeds in the presence of copper(II) phenylcyclopropyl carboxylate regioselectively at the N2 position.
Convenient Synthesis of Highly Functionalized Pyrazolines via Mild, Photoactivated 1,3-Dipolar Cycloaddition
作者:Yizhong Wang、Claudia I. Rivera Vera、Qing Lin
DOI:10.1021/ol7017328
日期:2007.10.1
cycloaddition procedure was successfully developed for the synthesis of polysubstituted pyrazolines. This procedure involved the in situ generation of the reactive nitrile imine dipoles using a hand-held UV lamp at 302 nm, followed by spontaneous cycloaddition with a broad range of 1,3-dipolarophiles with excellent solvent compatibility, functional group tolerance, regioselectivity, and yield.