作者:Tomáš Tobrman、Petr Štěpnička、Ivana Císařová、Dalimil Dvořák
DOI:10.1002/ejoc.200800017
日期:2008.4
N-dimethylformamide affords the corresponding 6,6′-, 2,2′-, and 8,8′-purine dimers in high yield. Cross-dimerization reactions of different iodo derivatives were attempted, but only mixtures containing the cross-coupled products, homodimers, or dehalogenation products were obtained. 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
在 N,N-二甲基甲酰胺中用噻吩-2-羧酸铜 (I) 或 3-甲基水杨酸铜 (I) 处理 9-或 7-取代的 6-、2- 或 8-碘嘌呤衍生物,得到相应的 6,6' -、2,2'- 和 8,8'- 嘌呤二聚体的高产率。尝试了不同碘衍生物的交叉二聚反应,但只获得了包含交叉偶联产物、同二聚体或脱卤产物的混合物。9,9'-二苄基-(1a)和9,9'-双(1-甲基乙基)-9H,9'H-[6,6']联嘌呤基(1c)及其盐[1aH2]Br2的晶体结构由单晶 X 射线衍射分析确定,揭示了广泛的氢键和 π···π 堆积相互作用。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)