[2+2+2]-Co-cyclotrimerization 6-alkynylpurines with diynes: a method for preparation of 6-arylpurines

A novel approach to 6-arylpurines based on [2+2+2]-co-cyclotrimerization of 6-alkynylpurines with various α,ω-diynes is described. Co-cyclotrimerization is catalyzed by Ni- and Co-phosphine catalysts and their choice depends on the substitution pattern of the both reactants. Graphic

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Bibliographic Details
Published in:Tetrahedron letters 2003-01, Vol.44 (4), p.785-788
Main Authors: Turek, Pavel, Kotora, Martin, Hocek, Michal, Cı́sařová, Ivana
Format: Article
Language:English
Subjects:
alkynes
cycloadditions
cyclotrimerizations
nucleosides
purines
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Summary:A novel approach to 6-arylpurines based on [2+2+2]-co-cyclotrimerization of 6-alkynylpurines with various α,ω-diynes is described. Co-cyclotrimerization is catalyzed by Ni- and Co-phosphine catalysts and their choice depends on the substitution pattern of the both reactants. Graphic
ISSN:0040-4039
1873-3581
DOI:10.1016/S0040-4039(02)02643-6