A short enantioselective synthesis of pipecolic acid
摘要:
A simple enantioselective route to pipecolic acid is described. The key step involves the Sharpless asymmetric epoxidation of an N-protected aminoheptenol which spontaneously cyclises to a piperidine derivative on deprotection.
A short enantioselective synthesis of pipecolic acid
摘要:
A simple enantioselective route to pipecolic acid is described. The key step involves the Sharpless asymmetric epoxidation of an N-protected aminoheptenol which spontaneously cyclises to a piperidine derivative on deprotection.
A concise diastereoselective approach to (+)-dexoxadrol, (−)-epi-dexoxadrol, (−)-conhydrine and (+)-lentiginosine from (−)-pipecolinic acid
作者:Chinmay Bhat、Santosh G. Tilve
DOI:10.1016/j.tet.2013.10.082
日期:2013.12
A new diastereoselective pathway for the totalsynthesis of (+)-dexoxadrol, first asymmetricsynthesis of (−)-epi-dexoxadrol and formalsynthesis of conhydrine and (+)-lentiginosine is presented using commercially available (−)-pipecolinic acid. The key reactions utilized are Sharpless asymmetric dihydroxylation and Wittig reaction. The paper further describes the study of effect of protecting groups
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.
Enantioselective total synthesis of the tricyclic 9-oxabispidine (1R,2S,9S)-11-methyl-13-oxa-7,11-diazatricyclo[7.3.1.02,7]tridecane
作者:Matthias Breuning、Melanie Steiner
DOI:10.1016/j.tetasy.2008.08.002
日期:2008.8
The enantiomerically pure tricyclic 9-oxabispidine (1R,2S,9S)-11-methyl-13-oxa-7,11-diazatricyclo[7.3.1.0(2.7) ]tridecane, a potential substitute for (+)-sparteine in asymmetric synthesis, was prepared in 7 steps and in 11% overall yield from a chiral epoxy alcohol and (S)-epichlorohydrin. The key intermediate was a bicyclic 9-oxabispidine with an appropriately functionalized, endo-oriented side chain. (C) 2008 Elsevier Ltd. All rights reserved.
THURKAUF, ANDREW;ZENK, PAUL C.;BALSTER, ROBERT L.;MAY, EVERETTE L.;GEORGE+, J. MED. CHEM., 31,(1988) N 12, C. 2257-2263
作者:THURKAUF, ANDREW、ZENK, PAUL C.、BALSTER, ROBERT L.、MAY, EVERETTE L.、GEORGE+