Synthesis of Highly Substituted Arenes via Cyclohexadiene–Alkene C–H Cross Coupling and Aromatization
作者:Anup Bhunia、Armido Studer
DOI:10.1021/acscatal.8b00083
日期:2018.2.2
The development of a cross-coupling method for the regioselective β-alkenylation of 2,5-cyclohexadiene carboxylic acid derivatives to form ortho-alkenylarenes through in situ decarboxylation and aromatization is described. The carboxylic acid functionality is used as a traceless directing group for efficient and mild β-alkenylation. The modular sequence comprises a reductive Birch α-alkylation, ionic
Transition-Metal-Free Semihydrogenation of Diarylalkynes: Highly Stereoselective Synthesis of <i>trans</i>-Alkenes Using Na<sub>2</sub>S·9H<sub>2</sub>O
作者:Zhengwang Chen、Miaoting Luo、Yuelu Wen、Guotian Luo、Liangxian Liu
DOI:10.1021/ol501137x
日期:2014.6.6
A highly stereoselective and efficient transition-metal-free semihydrogenation of internal alkynes to E-alkenes using cheap and green water as hydrogen donor is described. The reactions are conducted under convenient conditions and provide products in good to excellent yields, with broad substrate scope, including a variety of diarylalkynes.