113789-91-6Relevant academic research and scientific papers
Discovery of 3-piperidinyl-1-cyclopentanecarboxamide as a novel scaffold for highly potent CC chemokine receptor 2 antagonists
Yang, Lihu,Butora, Gabor,Jiao, Richard X.,Pasternak, Alex,Zhou, Changyou,Parsons, William H.,Mills, Sander G.,Vicario, Pasquale P.,Ayala, Julia M.,Cascieri, Margaret A.,MacCoss, Malcolm
, p. 2609 - 2611 (2008/02/05)
Introduction of ring restrictions to a linear aminobutyramide CC chemokine receptor 2 (CCR2) antagonist lead (2) led to the discovery of a 1,3-disubstituted cyclopentane scaffold with enhanced hCCR2 receptor binding and antagonist activity. (1S,3R)-N-[3,5
Intramolecular and intermolecular Schmidt reactions of alkyl azides with aldehydes
Lee, Huey-Lih,Aubé, Jeffrey
, p. 9007 - 9015 (2008/02/10)
Despite recent advances in the use of alkyl azides in ring expansion reactions of ketones, there has been little work done on the corresponding chemistry of aldehydes. In the present study, the Lewis acid-promoted reactions of alkyl azides with aldehydes
Photolysis of olefinic N-chloropyrrolidinones, N-chlorosuccinimides and N-chloro-oxazolidinones: Reactivity of cyclic carboxamidyl, imidyl and carbamyl radicals in intramolecular reactions
Daoust, Benoit,Lessard, Jean
, p. 3495 - 3514 (2007/10/03)
N-Chloro-alkenylpyrrolidinones, an N-chloro-alkenylsuccinimide and N- chloro-alkenyloxazolidinones were prepared as precursors of olefinic cyclic carboxamidyl, imidyl and carbamyl radicals constrained to undergo intramolecular reactions uniquely via their planar or slightly twisted (30- 35°) Π(N) state (1,5-transfer of an allylic hydrogen, 5-exo or 6-exo cyclization to give bicyclo[2.2.1]azaheptane and bicyclo[3.2.1]azaoctane skeletons respectively), those intramolecular reactions being unaccessible to the planar ΣN state. Their photolysis gave products arising uniquely from intermolecular reactions of those nitrogen radicals (addition to an external olefin, hydrogen abstraction from the solvent, allylic hydrogen abstraction). An intramolecular reaction leading to bicyclo[3.3.0]azaoctane derivatives via 5-exo cyclization was observed with an N-chloro-alkenylpyrrolidinone and an N-chloro-alkenyloxazolidinone. In these two cases, both the Π(N) and the Σ(N) states of the cyclic amidyl radical allow orbital overlap for 5-exo cyclization.
SYNTHESIS AND REACTIVITY OF METHYL γ-AZIDO BUTYRATES AND ETHYL δ-AZIDO VALERATES AND OF THE CORRESPONDING ACID CHLORIDES AS USEFUL REAGENTS FOR THE AMINOALKYLATION
Khoukhi, N.,Vaultier, M.,Carrie, R.
, p. 1811 - 1822 (2007/10/02)
The azidoesters 13 and 14 and the corresponding acid chlorides 22 and 23 are shown to be interesting reagents for the nucleophilic and electrophilic aminoalkylation. α-substituted methyl γ-azidobutyrates 13 and ethyl δ-azido valerates 14 are easily accessible by alkylation of the lithium enolates of the parent compounds 13a and 14a respectively.Their chemoselective reduction leads to 3-substituted lactams 18 and 19.The acid chlorides 22 and 23 issued from 13 and 14 react with nucleophilic reagents, i.e. the carbanion of Meldrum acid, trimethylphosphite and n-butylmanganous iodide giving the the ω-azido,β-ketoesters 25 and 26, the ω-azido,α-acylphosphonates 29 and 30 and the ω-azido ketones 38 and 39 respectively in good yields.The treatment of 25 and 26 by Ph3P in anhydrous ether leads to the cyclic β-enaminoesters 27 and 28 whereas the α-acylphosphonates give the cyclic iminophosphonates 33 and 34a in good yields.These cyclizations occur via an intramolecular aza-Wittig reaction.
