Diastereo- and enantioselective syntheses of (−)-coniine, (−)-solenopsin A, (−)-solenopsis fugaz venom and (−)-xenovenine via deoxygenative decarboxylation of 2-carbonylsultam-substituted n-hydroxy-piperidines and -pyrrolidines
作者:Wolfgang Oppolzer、Christian G. Bochet、Eric Merifield
DOI:10.1016/0040-4039(94)88213-4
日期:1994.9
Heating cyclic 2-carbonylsultam-substituted N-hydroxylamines 4 with NaH yields sultam auxiliary 8 and imines 10, which are trapped in situ either by i-Bu2AlH or organocerium reagents to give enantiomerically pure 2-mono- or trans-2,6(2,5)-disubstituted piperidines (pyrrolidines) 11 or 12.
加热循环2 carbonylsultam取代Ñ -hydroxylamines 4用NaH产量磺内酰胺辅助8个亚胺10,其被捕获在原位由任何我-Bu 2的AlH或有机铈试剂,得到对映体纯2单-或反式-2,6- (2,5)-二取代的哌啶(吡咯烷)11或12。