Proline catalyzed, one-pot three component Mannich reaction and sequential cyclization toward the synthesis of 2-substituted piperidine and pyrrolidine alkaloids
作者:Shibin Chacko、Ramesh Ramapanicker
DOI:10.1016/j.tetlet.2015.03.001
日期:2015.4
very effective one-potthreecomponentreaction of 4-bromobutanal or 5-bromopentanal, acetone, and p-anisidine catalyzed by proline is reported. A threecomponent Mannich reaction followed by cyclization leading to the synthesis of 2-substituted pyrrolidine and piperidine derivatives through simultaneous formation of two C–N and one C–C bond is reported. The usefulness of the reaction is demonstrated
Strategies for the Asymmetric Construction of Pelletierine and its Use in the Synthesis of Sedridine, Myrtine, and Lasubine
作者:Raed K. Zaidan、Paul Evans
DOI:10.1002/ejoc.201900477
日期:2019.9
Three methods are described for the synthesis of bothenantiomers of opticallyactive pelletierine. The usefulness of these compounds as building blocks is demonstrated in the asymmetric syntheses of several piperidine‐based compounds of interest.
Henry–Nef reaction: a practical and versatile chiral pool route to 2-substituted pyrrolidine and piperidine alkaloids
作者:Chinmay Bhat、Santosh G. Tilve
DOI:10.1016/j.tet.2013.05.055
日期:2013.7
for the synthesis of 2-substituted pyrrolidine and piperidine alkaloids containing 1,3-aminoketone and 1,3-amino alcohol units. The utility of the protocol is demonstrated by asymmetricsynthesis of 12 natural products of which asymmetricsynthesis of (−)-N-methylpelletierine is presented for the first time. The one-carbon homologation described also provides an alternate route for the synthesis of key
Synthetic Studies of Alkaloids Containing Pyrrolidine and Piperidine Structural Motifs
作者:Chinmay Bhat
DOI:10.1002/open.201402128
日期:2015.4
Avenues to asymmetricalkaloids! Various 2‐substituted pyrrolidine and piperidine chiral bioactive natural products were synthesized using a ‘chiral pool’ method. l‐proline and l‐pipecolinic acids with one chiral center served as the best precursors for the synthesis of these alkaloids. Overall, 14 total synthetic and 11 formal synthetic approaches were developed.
Protecting-Group-Directed Regio- and Stereoselective Oxymercuration–Demercuration: Synthesis of Piperidine Alkaloids Containing 1,2- and 1,3-Amino Alcohol Units
efficient synthesis of naturallyoccurring 1,2- and 1,3-amino alcohol unit containing 2-substituted piperidine alkaloids and their analogues has been developed from l-pipecolinic acid. The protocol describes the regio- and stereoselective oxymercuration–demercuration of 2-alkenyl piperidines based on protecting groups to give piperidine alkaloids as a key step. An efficient synthesis of naturally occurring