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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 YorkHydroxy- and Alkoxycyclizations of Enynes Catalyzed by Platinum(II) Chloride
Weitere Informationen
            
               
                  
                        
                              Received
                              2 September 2003 
                      
Publikationsdatum:
04. November 2003 (online)
            
         
      
   Publikationsverlauf
Publikationsdatum:
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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