ISSN:
0947-3440
Keywords:
Cyclization, palladium-catalyzed
;
Fluorenylidene, 4,5-diazafluorenylidene
;
Ozonolysis
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A convenient synthesis of the fluorenylidene and the 4,5-diazafluorenylidene moiety is described. The palladium-catalyzed coupling of 6,6′-dimethyl-2,2′-bipyrdine-3,3′-diyl bis(triflate) (2) with phenylacetylene leads to the 4,5-diazafluorenylidene compound 4 as the major reaction product by an intramolecular cyclization. Under the same conditions biphenyl-2,2′-diyl bis(triflate) (6) gives the threefold coupling product 7. The connectivity of 4 and 7 is confirmed by crystal structure analysis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jlac.199519950127