Scalable and Practical Synthesis of Halo Quinolin-2(1<i>H</i>)-ones and Quinolines
作者:Cornelia Zaugg、Gunther Schmidt、Stefan Abele
DOI:10.1021/acs.oprd.7b00124
日期:2017.7.21
A practical and scalable synthesis of halo quinolin-2(1H)-ones is presented. The heterocycles are easily accessed from inexpensive halo anilines in a two-step sequence. The anilines are acylated with methyl 3,3-dimethoxypropionate under basic conditions in quantitative yields. The crude amides undergo cyclization in sulfuric acid to the desired halo quinolin-2(1H)-ones in 28–93% yield (2 steps). The
The invention provides compounds of formula I:
wherein Y is F or Br; or a pharmaceutically acceptable salt thereof. The compounds are effective antitumor agents. The invention also provides pharmaceutical compositions comprising a compound of formula I or a salt thereof, intermediates useful for preparing a compound of formula I, therapeutic methods comprising administering a compound of formula I or a salt thereof to a mammal in need thereof, and methods of inhibiting cancer cells.