Trifluoromethanesulfonamide and its sodium salt reacted with bromoacetonitrile to give a mixture of N-(cyanomethyl)trifluoromethanesulfonamide and N,N-bis(cyanomethyl)trifluoromethanesulfonamide at ratios of 1:1 and 1:14, respectively.
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
Total Synthesis of Quinolizidine Alkaloid (−)-217A. Application of Iminoacetonitrile Cycloadditions in Organic Synthesis
作者:Kevin M. Maloney、Rick L. Danheiser
DOI:10.1021/ol051185n
日期:2005.7.1
[reaction: see text] An intramolecular iminoacetonitrile [4 + 2] cycloaddition functions as the key step in an efficient totalsynthesis of the quinolizidine alkaloid (-)-217A.