作者:Henriette M. Hansen、Morten Lysén、Mikael Begtrup、Jesper L. Kristensen
DOI:10.1016/j.tet.2005.08.051
日期:2005.10
A new and convergent synthesis of azaphenanthridines via an anionic ring closure is reported. Ortho-lithiation/in situ borylation of cyanopyridines produces the corresponding cyanopyridylboronic esters, which undergo a Suzuki–Miyaura cross-coupling to give the key intermediates. Addition of lithium morpholide produces the azaphenanthridines.
据报道通过阴离子闭环的新的和收敛的氮杂菲啶合成。邻-lithiation /氰基吡啶在原位硼化产生相应cyanopyridylboronic酯,它们经历铃木-宫浦交叉偶合,得到关键中间体。加入吗啉锂可产生氮杂菲啶。