A nickel-catalyzed tandem reaction involving cyclic esterification/C–S bond formation for synthesizing 5-oxa-11-thia-benzofluoren-6-ones
作者:Rongrong Cai、Qicai Wei、Runsheng Xu
DOI:10.1039/d0ra04367b
日期:——
A nickel-catalyzed tandemreaction involving cyclic esterification/C–S bond formation has been developed. Starting from samples containing 3-(2-hydroxy-phenyl)-acrylic acids with 2-halide-benzenethiols, versatile biologically active 5-oxa-11-thia-benzofluoren-6-one compounds were efficiently synthesized in good to high yields. This new methodology provides an economical approach toward C–S bond formation
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.