Acid- and Base-Switched Palladium-Catalyzed γ-C(sp<sup>3</sup>)–H Alkylation and Alkenylation of Neopentylamine
作者:Jinquan Zhang、Shuaizhong Zhang、Hongbin Zou
DOI:10.1021/acs.orglett.1c00903
日期:2021.5.7
unactivated C(sp3)–H and the reaction selectivity are among the core pursuits for transition-metal catalytic system development. Herein, we report Pd-catalyzed γ-C(sp3)–H-selective alkylation and alkenylation with removable 7-azaindole as a directing group. Acid and base were found to be the decisive regulators for the selective alkylation and alkenylation, respectively, on the same single substrate under otherwise
Acrylic and methacrylic esters can be obtained in one step from alkenes using a Pd(OAc)2/benzoquinone/MnO2 catalyst; with acrylic acid and a suitable alkene, it is also possible to obtain α-methylene γ-lactones in one step.
Direct Synthesis of Adipic Esters and Adiponitrile via Photoassisted Cobalt‐Catalyzed Alkene Hydrodimerization
作者:Cheng Ren、Guanghao Ji、Xiankai Li、Jing Zhang
DOI:10.1002/chem.202201442
日期:2022.9.22
cobalt-catalyzed tail-to-tail hydrodimerization of activated alkenes to 1,4-difunctional butanes, providing a general route to important industrial intermediates to nylon 6,6. This protocol is highly efficient for various activated alkenes at ambienttemperature utilizing hantzsch ester as a recyclable two-electron and two-proton donor with assistant of catalytic amount of base as the proton shuttle