Photo-catalyzed sequential dearomatization/carboxylation of benzyl o-halogenated aryl ether with CO2 leading to spirocyclic carboxylic acids
作者:Yaping Yi、Chanjuan Xi
DOI:10.1016/s1872-2067(21)63956-6
日期:2022.7
Photo-catalyzed tandem dearomatization/carboxylation of benzyl o-halogenated aryl ether with CO2 was achieved, which affords spirocyclic carboxylicacids under mild conditions. The reaction has good functional group tolerance with high yields. Mechanism studies indicate that the transformation was realized via intramolecular radical addition and nucleophilic addition.
functionalization of methylene C(sp3)–H bonds is one of the greatest challenges in transition metal-catalyzed C–H activation. Although Pd(0)-catalyzed intramolecular cyclization reactions of methylene C(sp3)–H bonds have been reported, intermolecular functionalization remains to be discovered. Herein, we report the first example of a Pd(0)-catalyzed intermolecular methylene C(sp3)–H functionalization reaction
Syntheses and Bioactivity of <i>o</i>- or <i>p</i>-Trifluoromethylphenyl Phosphates
作者:Xinming Zhou、Yantao He、Miao Wang、Yixiang Ding
DOI:10.1080/10426500802253090
日期:2009.3.10
o- and p-Trifluoromethylphenyl phosphates designed as mechanism-based phosphotyrosine phosphatase inactivators have been prepared. Some of them show herbicidal activities.