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A Base‐Promoted Tandem Reaction of 3‐(1‐Alkynyl)chromones with 1,3‐Dicarbonyl Compounds: An Efficient Approach to Functional Xanthones
Author(s) -
Zhao Lizhi,
Xie Fuchun,
Cheng Gang,
Hu Youhong
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200902618
Subject(s) - tandem , chemistry , catalysis , combinatorial chemistry , base (topology) , sequence (biology) , cascade reaction , organic chemistry , materials science , mathematical analysis , mathematics , composite material , biochemistry
No need for a transition‐metal catalyst is characteristic for the tandem process presented herein to obtain functionalized xanthones. The sequence involves multiple reactions, such as Michael addition‐elimination/cyclization/1,2‐addition/elimination reactions (see scheme).