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        Synthesis  2002(9): 1191-1194
DOI: 10.1055/s-2002-32542
   DOI: 10.1055/s-2002-32542
PAPER
© Georg Thieme Verlag Stuttgart · New YorkAn Efficient Synthesis of Dibenzocycloocta-4a,6a,-diene-5,11-diyne and its Precursors
Further Information
            
               
                  
                        
                              Received
                              27 April 2002 
                      
Publication Date:
28 June 2002 (online)
            
         
      
   Publication History
Publication Date:
28 June 2002 (online)
Abstract
Two efficient syntheses of dibenzocyclooctadienediyne 1 were developed employing known reactions, which utilize commercially available reagents. Both methods are an improvement on known syntheses resulting in 41% and 43% overall yields. The latter method also offers an efficient synthesis of dibenzocyclooctatetraene 9, which is one of the key reagents now commercially unavailable.
Key words
dibenzocyclooctadienediyne - elimination - lithium - sonication
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References
Brettreich M.; Bendikov, M.; Chaffins, S.; Duong, H.; Perepichka, D. F.; Helgeson, R.; Wudl, F., in press.