通过由市售和廉价的2-氨基硝基苯酚制备的2-碘硝基苯酚乙酸酯的Sonogashira交叉偶联反应已经实现了4-,5-和6-硝基苯并[ b ]呋喃的首次合成。将获得的2-炔基硝基苯酚乙酸酯在室温下进行KO t Bu促进的环化反应以形成硝基苯并[ b ]呋喃。给出了其他取代苯并[ b ]呋喃的合成和一锅偶联-环化的例子。
Synthesis of Dihydrobenzofurans via Palladium-Catalyzed Annulation of 1,3-Dienes by <i>o</i>-Iodoaryl Acetates
作者:Roman V. Rozhkov、Richard C. Larock
DOI:10.1021/jo100495t
日期:2010.6.18
palladium-catalyzed annulation of 1,3-dienes by o-iodoaryl acetates provides an efficient approach to biologically interesting dihydrobenzofurans. The annulation is believed to proceed via (1) oxidative addition of the aryl iodide to Pd(0), (2) syn-addition of the resulting arylpalladium complex to the 1,3-diene, (3) intramolecular coordination of the phenolic oxygen to the Pd center, (4) hydrolysis of the acetyl
Fluorogenic Cyclopropenones for Multicomponent, Real-Time Imaging
作者:Tyler K. Heiss、Robert S. Dorn、Andrew. J. Ferreira、Anna C. Love、Jennifer A. Prescher
DOI:10.1021/jacs.2c02058
日期:2022.5.4
Fluorogenic bioorthogonal reactions enable biomolecule visualization in realtime. These reactions comprise reporters that “light up” upon reaction with complementary partners. While the spectrum of fluorogenic chemistries is expanding, few transformations are compatible with live cells due to cross-reactivities or insufficient signal turn-on. To address the need for more suitable chemistries for cellular
Petjunin, Zhurnal Obshchei Khimii, 1944, vol. 14, p. 203,207
作者:Petjunin
DOI:——
日期:——
An Efficient Synthesis of Coumestrol and Coumestans by Iodocyclization and Pd-Catalyzed Intramolecular Lactonization
作者:Tuanli Yao、Dawei Yue、Richard C. Larock
DOI:10.1021/jo0517038
日期:2005.11.1
The iodocyclization of acetoxy-containing 2-(1-alkynyl)anisoles and subsequent direct palladium-catalyzed carbonylation/lactonization provide an efficient route to naturally occurring coumestan and coumestrol, and their related analogues.