Stereoselective synthesis of azepines through the conjugate addition of formamides to nitroalkenes and subsequent intramolecular nitrile oxide cycloaddition reaction
作者:Akio Kamimura、Takayuki Yoshida、Hidemitsu Uno
DOI:10.1016/j.tet.2008.09.070
日期:2008.12
A concise and stereoselective formation of azepines is achieved through the conjugateaddition of formamides to nitroalkenes and the subsequent intramolecular nitrile oxide cycloaddition (INOC) reaction. High cis-selectivity was observed. The one-pot modification of the two reactions provides direct preparation of azepines from nitroalkenes and formamides in moderate yields. The formyl group was readily