Phosphazene base-catalyzed intramolecular cyclization for efficient synthesis of benzofurans via carbon-carbon bond formation

An organic superbase, phosphazene P4-Bu-t, functioned as an active catalyst for intramolecular cyclization of o-alkynylphenyl ethers via carbon-carbon bond formation to provide an efficient synthetic method for 2,3-disubstituted benzofurans derivatives under mild reaction conditions without the need...

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Bibliographic Details
Published inChemical communications (Cambridge, England) no. 35; pp. 5248 - 5250
Main Authors Kanazawa, Chikashi, Goto, Kengo, Terada, Masahiro
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 01.01.2009
Subjects
Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
ORGANIC-BASE
ETHERS
HETEROCYCLES
ANNULATION
O-ALKYNYLPHENOLS
CONSTRUCTION
CARBOALKOXYLATION
POLYAMINOPHOSPHAZENES
2,3-DISUBSTITUTED BENZOFURANS
BENZODIFURANS
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Summary:An organic superbase, phosphazene P4-Bu-t, functioned as an active catalyst for intramolecular cyclization of o-alkynylphenyl ethers via carbon-carbon bond formation to provide an efficient synthetic method for 2,3-disubstituted benzofurans derivatives under mild reaction conditions without the need for a metal catalyst.
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ISSN:1359-7345
1364-548X
DOI:10.1039/b913588j