Synthesis of n-chloroquinolines and n-ethynylquinolines (n=2, 4, 8): homo and heterocoupling reactions
作者:J. Gonzalo Rodríguez、Cristobal de los Rios、Antonio Lafuente
DOI:10.1016/j.tet.2005.07.043
日期:2005.9
the appropriate n-chloroquinoline and 2-methyl-3-butyn-2-ol, catalyzed by palladium, followed by treatment with a catalytic amount of powdered sodium hydroxide in toluene. The n-(ethynyl)quinolines were transformed in the corresponding conjugate 1,4-bis[n′-(quinolyl)]buta-1,3-diynes by oxidative dimerization, catalyzed by cuprouschloride, with excellent yields. Moreover, the heterocoupling between