An efficient synthesis of cyanoarenes and cyanoheteroarenes via lithiation followed by electrophilic cyanation
作者:Nobuhiro Sato、Qi Yue
DOI:10.1016/s0040-4020(03)00985-2
日期:2003.7
arenes and heteroarenes into the ortho-cyano derivatives was achieved through directed lithiation followed by electrophiliccyanation with phenyl cyanate. This reaction method proved to be applicable to halogen–lithium exchanged intermediates, so especially useful for the synthesis of benzonitriles. The scope of the reaction sequence was explored using a number of substrates.
2-Aminothiabutadiene as Useful Building Block in the Synthesis of 2-Aminothiopyrans and 2-Aminothiophenes
作者:David Deniaud、Aélig Robin、Jean-Claude Meslin
DOI:10.1055/s-2004-829112
日期:——
We report a reliable and regiocontrolled alternative route to unsubstituted 2-aminothiopyrans and 2-aminothiophenes. These sulfur heterocycles were prepared by reaction of protected aminothiabutadiene 1 with acrylic dienophiles or acceptor-substituted halomethyl compounds. All compounds were fully characterized by IR, HRMS, and 13C and 1H NMR spectroscopy.