Facile Syntheses of Novel Benzo- 1,3-dioxolo-, Benzothiazolo-, Pyrido-, and Quinolino-fused 5<i>H</i>-Benzo[<i>d</i>]-pyrazolo[5,1-<i>b</i>][1,3]-oxazines and 1<i>H</i>-Pyrazoles
作者:Belem Avila、Danielle M. Solano、Makhluf J. Haddadin、Mark J. Kurth
DOI:10.1021/ol103108z
日期:2011.3.4
A number of novel benzo-1,3-dioxolo-, benzothiazolo-, pyrido-, and quinolino-fused 5H-benzo[d]pyrazolo[5,1-b][1,3]-oxazines and 1H-pyrazoles were synthesized utilizing an easy and effective N,N-bond forming heterocyclization reaction. In so doing, the substrate scope of this heterocyclization reaction, which starts with o-nitroheterocyclic aldehydes, was expanded to provide several unique heterocyclic compounds for biological screening. This work further demonstrates the versatility of this simple, base-mediated, one-pot heterocyclization method in the construction of novel heterocycles.