Stereoselective Synthesis of Amido and Phenyl Azabicyclic Derivatives via a Tandem Aza Prins-Ritter/Friedel–Crafts Type Reaction of Endocyclic <i>N</i>-Acyliminium Ions
作者:Kiran Indukuri、R. Unnava、Manash J. Deka、Anil K. Saikia
DOI:10.1021/jo401450j
日期:2013.11.1
A simple protocol is described for the synthesis of amido and phenyl hexahydroindolizin-3(2H)-one, hexahydro-1H-quinolizin-4(6H)-one, and 1,3,4,10b-tetrahydropyrido[2,1-a]isoindol-6(2H)-one derivatives via endo-trig (aza-Prins type) cyclization followed by an intermolecular Ritter/Friedel–Crafts reaction of cyclic N-acyliminium ions, which are derived from the boron trifluoride etherate treatment of
描述了一个简单的协议,用于合成酰胺基和苯基六氢吲哚并嗪-3(2 H)-one,六氢-1 H-喹啉嗪-4(6 H)-one和1,3,4,10 b-四氢吡啶并[2]内-trig(氮杂-普林斯型)环化反应后得到1,1 - a ] isoindol-6(2 H)-one衍生物,然后由三氟化硼衍生的环状N-酰基亚胺离子的分子间Ritter / Friedel-Crafts反应区域选择性还原的N-均烯丙基酰亚胺的醚化处理。该反应是高度非对映选择性的,具有优异的产率。