Stereocontrolled intramolecular michael-aldol reaction mediated with bu2botf and (tms)2nh
摘要:
Treatment of keto-esters 1-5 with Bu(2)BOTf and (TMS)(2)NH caused a tandem Michael-aldol reaction to give polycyclic cyclobutanes 6-10 with high stereoselection. It was proved that the reaction was accelerated by the addition of Bu(4)NI.
Stereocontrolled intramolecular michael-aldol reaction mediated with bu2botf and (tms)2nh
摘要:
Treatment of keto-esters 1-5 with Bu(2)BOTf and (TMS)(2)NH caused a tandem Michael-aldol reaction to give polycyclic cyclobutanes 6-10 with high stereoselection. It was proved that the reaction was accelerated by the addition of Bu(4)NI.
Intramolecular [4 + 2] Cycloadditions of Iminoacetonitriles: A New Class of Azadienophiles for Hetero Diels−Alder Reactions
作者:David T. Amos、Adam R. Renslo、Rick L. Danheiser
DOI:10.1021/ja034629o
日期:2003.4.1
Iminoacetonitriles participate as reactive dienophiles in stereoselectiveintramolecular hetero Diels-Alder reactions which afford substituted quinolizidines. The cycloadduct with exo-oriented cyano group is obtained as the major or exclusive product of the reaction as a consequence of the alpha-amino nitrile anomeric effect The alpha-amino nitrile moieties incorporated in the cycloadducts constitute
Treatment of keto-esters 1-5 with Bu(2)BOTf and (TMS)(2)NH caused a tandem Michael-aldol reaction to give polycyclic cyclobutanes 6-10 with high stereoselection. It was proved that the reaction was accelerated by the addition of Bu(4)NI.