LARCHEVEQUE M.; VALETTE G.; CUVIQNY TH., TETRAHEDRON, 1979, 35, NO 14, 1745-9
作者:LARCHEVEQUE M.、 VALETTE G.、 CUVIQNY TH.
DOI:——
日期:——
Milieux hyperbasiques
作者:M. Larchevêque、G. Valette、Th. Cuvigny
DOI:10.1016/0040-4020(79)88003-5
日期:1979.1
Substituted γ and δ-ketoaldehydes may be conveniently synthesized in two steps from imine carbanions, which are obtained by reaction with hyperbasic media. These anions are stable at low temperature (−30°); they react with functional electrophiles to afford masked ketoaldehydes which may be cyclised into various cyclopentenones or cyclohexenones.
<i>N</i>-phenyl-substituted pyrrolidines, piperidines and azabicyclics by a tandem reduction-double reductive amination reaction
作者:Richard A. Bunce、Derrick M. Herron、Jason R. Lewis、Sharadsrikar V. Kotturi
DOI:10.1002/jhet.5570400115
日期:2003.1
formed in high yield and are easily purified. The method has also been extended to the synthesis of fused N-phenylazabicyclics from 2-(3-oxo-propyl)cycloalkanones. A high degree of diastereoselectivity for the trans-fused product is observed in substrates having an ester group α to the cycloalkanone carbonyl. Bicyclic precursors lacking this ester group give mixtures of cis and trans products. Finally