Synthesis of biaryls using nickel-catalyzed [2+2+2] cocyclization
作者:Yoshihiro Sato、Kenji Ohashi、Miwako Mori
DOI:10.1016/s0040-4039(99)00945-4
日期:1999.7
Methods of synthesizing biaryls using nickel-catalyzed [2+2+2] cocyclization were developed. Two ways for the synthesis of biaryl using [2+2+2] cocyclization were investigated: one method is that biaryls synthesized from alkyne having a phenyl group and 2 equivalents of acetylene, and the other method is that those were synthesized from α,ω-diyne having a phenyl group at an α-position and acetylene
Condition-controlled selective synthesis of coumarins and flavones from 3-(2-hydroxyphenyl)propiolates and iodine
作者:Shuying Cai、Yang Shen、Ping Lu、Yanguang Wang
DOI:10.1016/j.tetlet.2011.05.150
日期:2011.8
2H-Chromen-2-ones (coumarins) and 4H-chromen-4-ones (flavones) were selectively prepared via the reaction of 3-(2-hydroxyphenyl)propiolates with iodine in toluene and N,N-dimethylformide, respectively. (C) 2011 Elsevier Ltd. All rights reserved.