作者:Shohei Yamamoto、Yutaka Saga、Takashi Andou、Shigeki Matsunaga、Motomu Kanai
DOI:10.1002/adsc.201300991
日期:2014.2.10
AbstractThe cobalt‐catalyzed direct C‐4 selective alkylation of quinolines is described. The reaction conditions used previously for pyridines were fully modified to achieve C‐4 selectivity in quinoline alkylation. Cobalt(II) acetate [Co(OAc)2] (2–4 mol%) in combination with butyllithium (BuLi) and pyridine was best, and C‐4 alkylation proceeded in 54–95% yield with C‐4/C‐2=>20:1–2.5:1 and branched/linear=>20:1 selectivity.magnified image