129446-23-7Relevant academic research and scientific papers
Chirospecific synthesis of trans-2,5-disubstituted pyrrolidines via stereoselective addition of organocopper reagents to N-acyliminium ions
Wistrand, Lars-G.,Skrinjar, Marco
, p. 573 - 582 (1991)
Reaction of the N-acyliminium ion precursor 1a (derived from S-proline via anodic methoxylation) with RCu in the presence of BF3·Et2O gives preferentially the trans adducts 2 (trans:cis ≥96:4). Using such a procedure, a general synthetic route to (2R, 5R)-trans-2,5-dialkylpyrrolidines has been developed, as exemplified by the chirospecific syntheses of the ant feromones trans 5-butyl-2-heptylpyrrolidine (10a), trans-5-ethyl-2-heptylpyrrolidine (10b) and trans-5-heptyl-2-(5-hexenyl)pyrrolidine (10c).
Enantioselective syntheses of 2,5-disubstituted pyrrolidines based on iridium-catalyzed allylic aminations-total syntheses of alkaloids from amphibian skins
Gaertner, Martin,Weihofen, Robert,Helmchen, Guenter
experimental part, p. 7605 - 7622 (2011/08/05)
A broadly applicable route to trans-2,5-disubstituted pyrrolidines has been developed. Key steps are an asymmetric iridium-catalyzed allylic amination, a Suzuki-Miyaura coupling, and an intramolecular aza-Michael addition. Enantiomeric excesses in the range of 93-99 % ee have been achieved. Total syntheses of the alkaloids (-)-225 C, (+)- and (-)-223 H (xenovenine), (+)-223 AB, (+)-195 B, and (+)-223 R have been carried out as applications. Copyright
(2R-trans)-2-Butyl-5-heptylpyrrolidine as a potent sigma receptor ligand produced by Streptomyces longispororuber
Kumagai, Kazuo,Shono, Kazushige,Nakayama, Hiroshi,Ohno, Yukihiro,Saji, Ikutaro
, p. 467 - 473 (2007/10/03)
A potent sigma (σ) receptor ligand was isolated from the culture broth of Streptomyces longispororuber 525. The active compound was identified to be (2R-trans)-2-butyl-5-heptylpyrrolidine by spectroscopic and chemical studies. The compound exhibited high affinity and selectivity for σ receptors. The IC50 values toward σ1, σ2 and dopamine D2 receptors were 2.0, 22.7 and more than 40,000 nM, respectively. Its (2S-trans)- and (±)-cis-isomers, both synthesized, were also found to be high affinity σ ligands.
Diastereo- and enantioselective syntheses of (-)-coniine, (-)-solenopsin A, (-)-solenopsis fugax venom and (-)-xenovenine via deoxygenative decarboxylation of 2-carbonylsultam-substituted N-hydroxy-piperidines and -pyrrolidines
Oppolzer,Bochet,Merifield
, p. 7015 - 7018 (2007/10/02)
Heating cyclic 2-carbonylsultam-substituted N-hydroxylamines 4 with NaH yields sultam auxiliary 8 and imines 10, which are trapped in situ either by i-Bu2AlH or organocerium reagents to give enantiomerically pure 2-mono- or trans-2,6(2,5)-disubstituted piperidines (pyrrolidines) 11 or 12.
