"12" . . . "P(GA203/06/0888), Z(MSM0021620857), Z(MSM6046137301)" . . "[AB31FD8D5A86]" . "Preparation and Crystal Structures of Purine 2,2\u00B4-, 6,6\u00B4-, and 8,8\u00B4-Dimers"@en . . "Preparation and Crystal Structures of Purine 2,2\u00B4-, 6,6\u00B4-, and 8,8\u00B4-Dimers" . . "RIV/60461373:22310/08:00020042" . . . . . "389008" . "Preparation and Crystal Structures of Purine 2,2\u00B4-, 6,6\u00B4-, and 8,8\u00B4-Dimers"@en . . "P\u0159\u00EDprava a krystalov\u00E1 struktura purinov\u00FDch 2,2\u00B4-, 6,6\u00B4-, a 8,8\u00B4-dimer\u016F"@cs . . . "European Journal of Organic Chemistry" . "2"^^ . "RIV/60461373:22310/08:00020042!RIV09-MSM-22310___" . "4"^^ . "P\u0159\u00EDprava a krystalov\u00E1 struktura purinov\u00FDch 2,2\u00B4-, 6,6\u00B4-, a 8,8\u00B4-dimer\u016F"@cs . . . . "Preparation and Crystal Structures of Purine 2,2\u00B4-, 6,6\u00B4-, and 8,8\u00B4-Dimers" . "22310" . "\u0160t\u011Bpni\u010Dka, Petr" . . "8"^^ . "Tobrman, Tom\u00E1\u0161" . "Treatment of 9- or 7-substituted 6-, 2- or 8-iodopurine derivatives with copper(I) thiophene-2-carboxylate or copper(I) 3-methylsalicylate in N,N-dimethylformamide affords the corresponding 6,6\u00B4-, 2,2\u00B4- and 8,8\u00B4-purine dimers in high yield. Attempts at cross-dimerization of different iodo derivatives lead only to mixtures containing the cross-coupled products, homodimers or dehalogenation products. The crystal structures of 9,9'-dibenzyl- (1a) and 9,9'-bis(1-methylethyl)-9H,9'H-[6,6']bipurinyl (1c), and the salt [1aH2]Br2 have been determined by single-crystal X-ray diffraction analysis, revealing extensive hydrogen bonding and pxxxp stacking interactions." . "Nucleobases; Dimerization; Copper; Purine dimers; X-ray diffraction"@en . . "DE - Spolkov\u00E1 republika N\u011Bmecko" . . . "C\u00EDsa\u0159ov\u00E1, Ivana" . "1434-193X" . . "Treatment of 9- or 7-substituted 6-, 2- or 8-iodopurine derivatives with copper(I) thiophene-2-carboxylate or copper(I) 3-methylsalicylate in N,N-dimethylformamide affords the corresponding 6,6\u00B4-, 2,2\u00B4- and 8,8\u00B4-purine dimers in high yield. Attempts at cross-dimerization of different iodo derivatives lead only to mixtures containing the cross-coupled products, homodimers or dehalogenation products. The crystal structures of 9,9'-dibenzyl- (1a) and 9,9'-bis(1-methylethyl)-9H,9'H-[6,6']bipurinyl (1c), and the salt [1aH2]Br2 have been determined by single-crystal X-ray diffraction analysis, revealing extensive hydrogen bonding and pxxxp stacking interactions."@en . "000255508600018" . "P\u016Fsoben\u00EDm thiofen-2-karboxyl\u00E1tu m\u011B\u010Fn\u00E9ho vznikaj\u00ED z 9- nebo 7-substituovan\u00FDch 6-, 2-, nebo8-jodpurin\u016F p\u0159\u00EDslu\u0161n\u00E9 2,2\u00B4-, 6,6\u00B4-, a 8,8\u00B4-dimery."@cs . "Dvo\u0159\u00E1k, Dalimil" . .