2,4-Dibromopyridines reacted with arylacetylenes, catalyzed by Pd(CF3COO)2/CuI/PPh3 in the presence of i-Pr2NH in CH3CN at reflux for 24 h, to afford 2-alkynylpyridines in good to high yields, while 2,3- and 2,5-dihalopyridines reacted with arylacetylenes, catalyzed by Pd(OAc)2/CuI/PPh3 in the presence of i-Pr2NH in CH3CN at reflux for 24 h, to afford 2-alkynylpyridines in good to high yields.
在CH 3 CN中,在i -Pr 2 NH存在下,Pd(CF 3 COO)2 / CuI / PPh 3催化Pd(CF 3 COO)2 / CuI / PPh 3催化2,4-二
溴吡啶,回流24 h,得到2-炔丙基
吡啶在i -Pr 2 NH在CH 3 CN中回流24 h的条件下,Pd(OAc)2 / CuI / PPh 3催化Pd(OAc)2 / CuI / PPh 3催化2,3和2,5-二卤代
吡啶与芳基
乙炔反应。以高至高收率得到2-炔基
吡啶。