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Synthesis 2003(18): 2898-2902
DOI: 10.1055/s-2003-42456
DOI: 10.1055/s-2003-42456
PSP
© Georg Thieme Verlag Stuttgart · New York
Hydroxy- and Alkoxycyclizations of Enynes Catalyzed by Platinum(II) Chloride
Further Information
Received
2 September 2003
Publication Date:
04 November 2003 (online)
Publication History
Publication Date:
04 November 2003 (online)
Abstract
The cyclization of 1-en-6-ynes catalyzed by PtCl2 in the presence of water or alcohols affords five or six-membered ring carbocycles containing hydroxy or alkoxy functional groups in high yields. The alkoxycyclizations can also be performed with AuCl3 as catalyst. The reaction is stereospecific, atom-economical, and takes place in environmentally friendly solvents.
Key words
enynes - platinum - gold - cyclizations - carbenes
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