Synthesis of Purines Bearing Functionalized C-Substituents by the Conjugate Addition of Nucleophiles to 6-Vinylpurines and 6-Ethynylpurines
作者:Martin Kuchař、Radek Pohl、Ivan Votruba、Michal Hocek
DOI:10.1002/ejoc.200600545
日期:2006.11
Purines bearing diverse β-substituted ethyl or vinyl groups in position 6 were prepared by the conjugate addition of N-, O- and S-nucleophiles to 6-vinylpurines or 6-ethynylpurines. The scope of this methodology was systematically studied. The addition of amines, alcoholates and thiolates to 6-vinylpurines gave the corresponsing 6-(2-aminoethyl)-, 6-(2-alkoxyethyl)- and 6-[2-(alkylsulfanyl)ethyl]purines
通过将 N-、O-和 S-亲核试剂共轭加成到 6-乙烯基嘌呤或 6-乙炔基嘌呤,制备在 6 位带有多种 β-取代乙基或乙烯基的嘌呤。系统地研究了这种方法的范围。将胺、醇化物和硫醇化物添加到 6-乙烯基嘌呤中得到相应的 6-(2-氨基乙基)-、6-(2-烷氧基乙基)-和 6-[2-(烷基硫基)乙基]嘌呤。胺与 6-乙炔基嘌呤的加成得到 6-(2-氨基乙烯基)嘌呤,而醇化物和硫醇化物的加入得到 6-(2-二烷氧基乙基)-和 6-[2-双(烷基硫基)乙基]嘌呤。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)