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- Title
Catalytic Availabilities of Lewis Acidic SnCl<sub>2</sub>: Ph<sub>3</sub>PAuCl-SnCl<sub>2</sub> Composite Catalyzed Successive ortho-Alkenylation/O-Alkenylation of Phenols Followed by Cyclization to 1-Benzopyrans.
- Authors
Tochigi, Atsushi; Tsukamoto, Kadzuoki; Suzuki, Noriyuki; Masuyama, Yoshiro
- Abstract
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.
- Subjects
LEWIS acids; ALKENYLATION; PHENOLS; BENZOPYRANS; CATALYSTS
- Publication
European Journal of Organic Chemistry, 2016, Vol 2016, Issue 34, p5678
- ISSN
1434-193X
- Publication type
Article
- DOI
10.1002/ejoc.201601042