Coupling reactions of ortho-substituted aryl halides with alkynes. The synthesis of functionalized 1-naphthyl-, 1-(1-naphthyl)-2-phenyl-, and 1,2-bis(1-naphthyl)acetylenes
作者:Irena G. Stará、Ivo Starý、Adrian Kollárovič、Filip Teplý、David Šaman、Pavel Fiedler
DOI:10.1016/s0040-4020(98)00655-3
日期:1998.9
Coupling of 2-functionalized 1-naphthyl halides with gaseous acetylene, (trialkylsilyl)acetylenes, and aryl acetylenes under Pd(PPh3)4 or catalysis has been investigated to prepare 1-naphthyl-, 1-(1-naphthyl)-2-phenyl-, and 1,2-bis(1-naphthyl)acetylenes with various ortho substituents, i.e., the -CH3, -CH2OH, -CO2Me, and -CH2OCH2CCCH3 groups. The reaction conditions have been optimized (yields up
在Pd(PPh 3)4或催化作用下,研究了2-官能化的1-萘基卤化物与气态乙炔,(三烷基甲硅烷基)乙炔基和芳基乙炔的偶合反应以制备1-萘基-,1-(1-萘基)-2-苯基- ,和1,2-双(1-萘基)乙炔与各种邻位的取代基,即,对-CH 3,-CH 2 OH,-CO 2 Me和-CH 2 OCH 2 CCCH 3个基团。通过改变芳基卤化物中的卤素原子,溶剂,(三烷基甲硅烷基)乙炔中的烷基和催化剂(Pd(O)vs.)。在具有连接的炔烃单元的1-萘碘化物的情况下,已观察到偶联可与级联的分子内Heck型反应竞争。已经讨论了β-消除氢化钯物种的机理。已经发现带有-CO 2 Me基团的1-萘基溴易于被溶剂进行亲核芳族取代。已经显示,不对称的1-(1-萘基)-2-苯基乙炔衍生物的成功合成关键取决于芳基卤化物/芳基乙炔的组合。