Novel and Efficient One-Step Parallel Synthesis of Dibenzopyranones via Suzuki−Miyaura Cross Coupling
作者:Kodumuru Vishnumurthy、Alexandros Makriyannis
DOI:10.1021/cc100068a
日期:2010.9.13
Microwave-promoted novel and efficient one-step parallel synthesis of dibenzopyranones and heterocyclic analogues from bromo arylcarboxylates and o-hydroxyarylboronic acids viaSuzuki−Miyauracrosscoupling reaction is described. Spontaneous lactonization gave dibenzopyranones and heterocyclic analogues bearing electron-donating and -withdrawing groups on both aromatic rings in good to excellent yields
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.
Ruthenium-Catalyzed Carbonylative C–H Cyclization of 2-Arylphenols: A Novel Synthetic Route to 6<i>H</i>-Dibenzo[<i>b,d</i>]pyran-6-ones
作者:Kiyofumi Inamoto、Jun Kadokawa、Yoshinori Kondo
DOI:10.1021/ol401734m
日期:2013.8.2
Catalytic carbonylative C-H cyclization of 2-arylphenols can be achieved in the presence of a ruthenium-based catalytic system. The process proceeds efficiently under balloon pressure of CO and produces variously substituted 6H-dibenzo[b,d]pyran-6-one compounds, typically in good to high yields. Functional groups such as the alkoxycarbonyl and acetyl groups as well as halogen atoms (F, Cl, and Br) are well tolerated during the reaction.
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。