A novel approach to 6-alkynylpurines based on [2+2+2]-co-cyclotrimerization of 6-alkynylpurines with various alfa, omega-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.
A novel approach to 6-alkynylpurines based on [2+2+2]-co-cyclotrimerization of 6-alkynylpurines with various alfa, omega-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. (en)