作者:Tomáš Tobrman、Dalimil Dvořák
DOI:10.1002/ejoc.200800091
日期:2008.6
conditions of the Heck reaction, 9-benzyl-6-iodopurine affords mainly the corresponding 6,6′-dimer, the Heck product being formed only in low yield (≤12 %). With 7-benzyl-6-iodopurine the dimerization is suppressed and the Heck product is obtained in 32–91 % yield. 9-Substituted 6-chloro-2-iodopurines react smoothly, giving 2-alkenyl-6-chloropurines in 71–97 % isolated yields. The reaction proceeds with
在 Heck 反应条件下,9-benzyl-6-iodopurine 主要提供相应的 6,6'-二聚体,Heck 产物仅以低产率(≤12%)形成。使用 7-benzyl-6-iodopurine,二聚化被抑制,Heck 产物的产率为 32-91%。9-取代的 6-氯-2-碘嘌呤反应平稳,以 71–97% 的分离产率得到 2-烯基-6-氯嘌呤。该反应与带有吸电子取代基的烯烃(如 CO2Bu、COCH3、CN)和 Ph 一起进行,而乙酸乙烯酯和十二-1-烯不反应。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)