Palladium-Catalyzed Direct Annulation of Benzoic Acids with Phenols to Synthesize Dibenzopyranones
作者:Yang Wang、Jie-Yu Gu、Zhang-Jie Shi
DOI:10.1021/acs.orglett.7b00177
日期:2017.3.17
Direct annulation of benzoic acids with phenols via palladium-catalyzed oxidative coupling is reported. Readily available and inexpensive starting materials were used in this novel method to synthesize highly valuable and useful dibenzopyranone scaffolds. Broad substrate scope and simple operation make this method potentially practical. Preliminary mechanistic studies were conducted to understand this
Mild ArI-Catalyzed C(sp<sup>2</sup>)H or C(sp<sup>3</sup>)H Functionalization/CO Formation: An Intriguing Catalyst-Controlled Selectivity Switch
作者:Xueqiang Wang、Joan Gallardo-Donaire、Ruben Martin
DOI:10.1002/anie.201407011
日期:2014.10.6
A tandem C(sp2)H and C(sp3)Hfunctionalization/CO bond formation catalyzed by iodine(III) reagents generated in situ has been developed. The method shows wide scope under mild conditions and exhibits an unprecedented selectivity profile that can be switched depending on the catalyst employed.
C(SP A串联2) H和C(SP 3) ħ官能/ C 由碘催化O键形成原位产生(III)的试剂已经被开发出来。该方法在温和条件下显示范围广,并且显示出前所未有的选择性曲线,可以根据所用催化剂进行切换。
Synthesis of Dibenzopyranones through Palladium-Catalyzed Directed C-H Activation/Carbonylation of 2-Arylphenols
作者:Shuang Luo、Fei-Xian Luo、Xi-Sha Zhang、Zhang-Jie Shi
DOI:10.1002/anie.201304295
日期:2013.9.27
Dibenzopyranones were synthesized by a palladium‐catalyzed phenol‐directed C–H activation/carbonylation of 2‐phenylphenol derivatives in the presence of CO. Pd(OAc)2 was used as a catalyst and Cu(OAc)2 as a catalytic oxidant in the presence of air.