Stereoselective nucleophilic addition reactions to cyclic n-acyliminium ions using the indirect cation pool method: Elucidation of stereoselectivity by spectroscopic conformational analysis and dft calculations
In this study, six-membered N-acyliminium ions were generated by the “indirect cation pool” method and reacted with several nucleophiles. These reactions afforded disubstituted piperidine derivatives with high diastereoselectivities and good to excellent
α-Lithioamine Synthetic Equivalents: Syntheses of Diastereoisomers from the Boc Piperidines
The α'-lithiations and electrophilic substitutions of selected Boc piperidines provide single or separable diastereoisomeric 2-substituted, 2,4-disubstituted, and 2,4,6-trisubstituted Boc piperidines which are readily hydrolyzed to the substituted piperidines.
Beak, Peter,Lee, Won Koo
p. 2578 - 2580
(2007/10/02)
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