Unexpected and Divergent Reactions of N-Formyl-1,2-dihydroquinolines with Sodium Azide: Highly Chemoselective Formation of 2-Substituted Quinolines and Isoxazolo[4,3-c]quinolines
Intramolecular Cyclization of 2′-Aminochalcones by Halomethyleniminium Salts Derived from BTC/DMF
作者:Zhen-Hua Li、Cun Zheng、Ren-Er Chen、Weike Su
DOI:10.1080/00304940902802156
日期:2009.5.12
Unexpected and Divergent Reactions of N-Formyl-1,2-dihydroquinolines with Sodium Azide: Highly Chemoselective Formation of 2-Substituted Quinolines and Isoxazolo[4,3-c]quinolines
作者:Weike Su、Jingbo Yu、Zhenhua Li、Bei Zheng
DOI:10.1055/s-0029-1219800
日期:2010.5
Efficient and divergent synthesis of 2-substituted quinolines and isoxazolo[4,3-c]quinolines was achieved from N-formyl-1,2-dihydroquinolines with the aid of sodium azide. The synthesis is substituent-dependent. Thus N-formyl-1,2-dihydroquinolines with a hydrogen atom at the 3-position afforded 2-substituted quinolines in good to excellent yields, while with a 3-formyl group, N-formyl-1,2-dihydroquinolines unexpectedly gave isoxazolo[4,3-c]quinolines in high yields.