Journal
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2016, Issue 34, Pages 5678-5685Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201601042
Keywords
Homogeneous catalysis; Gold; Tin; Alkynes; Alkenylation; Cyclization
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Funding
- Grants-in-Aid for Scientific Research [26410058] Funding Source: KAKEN
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A Ph3PAuCl-SnCl2 composite, prepared in situ from Ph3PAuCl and SnCl2, catalyzed the formation of 1-benzopyrans from phenols and phenylacetylene. The Ph3PAuCl-SnCl2 composite catalyzed reaction was presumed to proceed through the successive ortho-alkenylation and O-alkenylation of phenols with phenylacetylene followed by cyclization of the prepared ortho- and O-dialkenylated phenol derivatives. Conveniently, all reactions with Ph3PAuCl-SnCl2 composite were established without rigorous exclusion of air and water.
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