A novel multicomponent reaction to synthesize substituted furo[3,2-c]chromenes via a Pd-catalyzed cascade process
作者:Lizhi Zhao、Gang Cheng、Youhong Hu
DOI:10.1016/j.tetlet.2008.10.025
日期:2008.12
A novel one-pot three-component reaction for the synthesis of multisubstituted furo[3,2-c]chromenes using 3-(1-alkynyl)chromones, aryl iodides, and alcohols is developed via Pd-catalyzed cascade 1,4-addition and cyclization. This synthetic approach efficiently generates two C–O bonds and one C–Cbond to construct diverse furo[3,2-c]chromenes structures.
通过钯催化的级联1,4-加成反应,开发了一种新颖的一锅三组分反应,该反应可使用3-(1-炔基)色酮,碘代芳基和醇类合成多取代的呋喃并[3,2- c ]色烯。和环化。这种合成方法可以有效地产生两个C–O键和一个C–C键,以构建不同的呋喃[3,2- c ]苯二甲基结构。
Base-Promoted One-Pot Tandem Reaction of 3-(1-Alkynyl)chromones under Microwave Irradiation to Functionalized Amino-Substituted Xanthones
作者:Yang Liu、Liping Huang、Fuchun Xie、Youhong Hu
DOI:10.1021/jo1013614
日期:2010.9.17
A base-promoted one-pot tandemreaction has been developed from 3-(1-alkynyl)chromones with various acetonitriles to afford functionalized amino-substituted xanthones 3 under microwave irradiation. This tandem process involves multiple reactions, such as Michael addition/cyclization/1,2-addition, without a transition metal catalyst. This method provides an efficientapproach to build up natural product-like
Synthesis of novel functional polycyclic chromones through Michael addition and double cyclizations
作者:Yang Liu、Liping Huang、Fuchun Xie、Xuxing Chen、Youhong Hu
DOI:10.1039/c0ob01000f
日期:——
2-halobenzylic nitriles (esters or amides) for the synthesis of novel functional polycyclic chromenones has been developed. This tandem process involves multiple reactions, such as Michael addition and double cyclizations without a transition metal catalyst.
Base-Promoted Cascade Reactions of 3-(1-Alkynyl)chromones with Pyridinium Ylides to Chromeno[2,3-<i>d</i>]azepine Derivatives
作者:Yu-Fang Zhang、Wen-Di Duan、Jingjing Chen、Youhong Hu
DOI:10.1021/acs.joc.8b03210
日期:2019.4.5
A base-promoted cascade reaction of 3-(1-alkynyl)chromones with pyridinium ylides has been developed to afford a novel chromeno[2,3-d]azepine scaffold in an efficient and economic manner. This tandem process involves multiple reactions including a Michael addition/deprotonation/alkyne–allene isomerization/cyclization and the subsequent 1,2-addition under mild conditions without a transition metal catalyst
已经开发了碱促进的3-(1-炔基)色酮与吡啶鎓叶立德的级联反应,以有效和经济的方式提供了一种新型的铬诺[2,3- d ]]庚因支架。该串联过程涉及多个反应,包括迈克尔加成/去质子化/炔烃-丙二烯异构化/环化以及随后在温和条件下没有过渡金属催化剂的1,2-加成。
A Base-Promoted Tandem Reaction of 3-(1-Alkynyl)chromones with 1,3-Dicarbonyl Compounds: An Efficient Approach to Functional Xanthones
作者:Lizhi Zhao、Fuchun Xie、Gang Cheng、Youhong Hu
DOI:10.1002/anie.200902618
日期:2009.8.17
No need for a transition‐metal catalyst is characteristic for the tandem process presented herein to obtain functionalizedxanthones. The sequence involves multiple reactions, such as Michael addition‐elimination/cyclization/1,2‐addition/elimination reactions (see scheme).