Studies on Tetrahydrofuran-Based Highly O-Functionalized Alkynes: Applications to Synthesis of Tetrahydrofuranyl-Polyynes and C-Nucleoside Analogues
作者:P. Venkat Reddy、Vikas Bajpai、Brijesh Kumar、Arun K. Shaw
DOI:10.1002/ejoc.201001442
日期:2011.3
applied to the synthesis of symmetrical butadiynyl (32―37), octatetraynyl (47) and do-decahexaynyl (49) polyynes. The unsymmetrically substituted diynes 39, 40 and 41 and triynes 43 and 44 were synthesized by coupling reaction between the newly synthesized bromoalkyne/diynes 38/42 and commercially available (trialkylsilyl)acetylenes. Syntheses of the 1,2,3-triazolyl-C-nucleoside analogue 51 and of the
对映异构纯的四氢呋喃基炔烃 17-20 是通过多种方法合成的。通过利用这些炔烃,开发了一种在无其他添加剂(如胺或碱、磷烷和钯催化剂)的干燥 DMF 中的有效 CuI 催化 sp-sp 碳均质偶联方案。该方法已应用于对称丁二炔基(32-37)、辛四炔基(47)和十二炔基(49)聚炔的合成。不对称取代的二炔 39、40 和 41 以及三炔 43 和 44 通过新合成的溴炔/二炔 38/42 与市售(三烷基甲硅烷基)乙炔之间的偶联反应合成。1,2,3-三唑基-C-核苷类似物51和乙炔基-和丁二炔基-桥连的1,2,3-三唑基-C-核苷类似物52和53的合成通过1、