Electroreductive Intermolecular Coupling of Chromones with Benzophenones: Synthesis of 2-Diarylmethylchromones and Tetrasubstituted Furans
作者:Naoki Kise、Hiroaki Nagamine、Toshihiko Sakurai
DOI:10.1002/ejoc.201900519
日期:2019.6.16
The electroreductive coupling of chromones with benzophenones in the presence of TMSCl gave adducts reacted at the 2‐position of chromones as trimethylsilyl ethers. From 3‐methyl‐ and 3‐phenylchromones, 2,3‐cis‐adducts were formed predominantly. 2‐Diarylmethylchromones were obtained by dehydrosiloxylation of the adducts. Tetrasubstituted furans were also synthesized from the adducts through ring‐opening
在TMSC1存在下,色酮与二苯甲酮的电还原偶联使加合物在色酮的2位反应为三甲基甲硅烷基醚。由3-甲基和3-苯基色酮,主要形成2,3-顺式加合物。通过加合物的脱氢甲硅烷氧基化获得2-二芳基甲基色酮。还通过开环产物从加合物合成了四取代的呋喃。