BF3·OEt2-Mediated 1,3-Hydride Shift Followed by 6π Electrocyclization: An Efficient Route for the Synthesis of Pyridopyrimidine, Pyranoquinoline, and Phenanthroline Derivatives
作者:Krishna C. Majumdar、Sudipta Ponra、Raj Kumar Nandi
DOI:10.1002/ejoc.201101065
日期:2011.12
The synthesis of pyridopyrimidine, pyranoquinoline, and phenanthrolinederivatives can be easily and efficiently accomplished by the direct reaction of a 1-aminopenta-1,4-diene fragment, an aromatic aldehyde, and BF 3 ·OEt 2 in the absence of any metal catalyst. The notable features of this procedure are mild reaction conditions, good to high yields, and operational simplicity.