Three-Component One-Pot Approach to Synthesize Benzopyrano[4,3-d]pyrimidines
摘要:
A novel benzopyrano[4,3-d]pyrimidine scaffold was generated via a three-component one-pot reaction from iodochromone, alkyne, and an amidine through a Sonogashira coupling, condensation, and cycloaddition. This combinatorial synthetic approach provides an efficient, easy construction of a diversified heterocyclic compounds library.
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.
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).
A base-promoted desalicyloylative dimerization of 3-(1-alkynyl)chromones: An unusual approach to 2-alkynyl xanthones
作者:Fuchun Xie、Xuan Pan、Shijun Lin、Youhong Hu
DOI:10.1039/b925234g
日期:——
A novel base-promoted cascade desalicyloylative dimerization of 3-(1-alkynyl)chromones to produce 2-alkynyl xanthones has been developed. This tandem process involves multiple reactions, such as Michael additions/cyclizations/desalicyloylation without a transition metal catalyst and inert atmosphere.
One-pot synthesis of furocoumarins through cascade addition–cyclization–oxidation
作者:Gang Cheng、Youhong Hu
DOI:10.1039/b705315k
日期:——
A novel one-potcascade addition-cyclization-oxidation for the regioselective synthesis of furo[3,2-c]coumarins has been developed; the reaction is mild and easily handled without the necessity for dry solvents and inert atmosphere.