Development of Highly Regioselective Amidyl Radical Cyclization Based on Lone Pair−Lone Pair Repulsion
作者:Xinting Yuan、Kun Liu、Chaozhong Li
DOI:10.1021/jo800845b
日期:2008.8.1
The substituent effect on the reactivity and regioselectivity of N-(4-pentenyl)amidyl radicalcyclization was investigated. Exclusive 6-endo cyclization was observed for N-(4-pentenyl)amidyl radicals with internal vinylic heteroatom substitution (Cl, Br, I, OMe, SEt). The substituent on the carbonyl group also showed a significant influence on the reactivity of amidyl radicals, which increases in the
3-(3,4-DIOXYPHENYL)-PYRROLIDINES AS TYPE IV PHOSPHODIESTERASE INHIBITORS FOR THE TREATMENT OF INFLAMMATORY DISEASES
申请人:GLAXO WELLCOME INC.
公开号:EP0720600A1
公开(公告)日:1996-07-10
[EN] 3-(3,4-DIOXYPHENYL)-PYRROLIDINES AS TYPE IV PHOSPHODIESTERASE INHIBITORS FOR THE TREATMENT OF INFLAMMATORY DISEASES<br/>[FR] 3-(3,4-DIOXYPHENYL)-PYRROLIDINES UTILISES COMME INHIBITEURS DE LA PHOSPHODIESTERASE DE TYPE IV POUR TRAITER LES MALADIES INFLAMMATOIRES
申请人:GLAXO WELLCOME INC.
公开号:WO1995008534A1
公开(公告)日:1995-03-30
(EN) Novel pyrrolidine compounds of formula (I) which are useful for inhibiting the function of Type IV phosphodiesterase (PDE-IV) as wll as methods for making the same are disclosed. Applications in treating inflammatory diseases and other diseases involving elevated levels of cytokines, as well as central nervous system (CNS) disorders, are also disclosed.(FR) Cette invention concerne des nouveaux composés de pyrrolidine de formule (I) qui sont utiles pour inhiber le fonctionnement de la phosphodiestérase de type IV (PDE-IV) ainsi que des procédés de production de ces derniers. Des applications de ces nouveaux composés dans le traitement des maladies inflammatoires et d'autres maladies associées à des taux élevés de cytokines, et dans le traitement des dérèglements du système nerveux central sont également décrites.
Amide-Group-Directed Protonolysis of Cyclopropane: An Approach to 2,2-Disubstituted Pyrrolidines
作者:Marija Skvorcova、Aigars Jirgensons
DOI:10.1021/acs.orglett.7b00584
日期:2017.5.19
Regioselective protonolytic C–C bond cleavage of acylated aminomethyl cyclopropanes can be achieved using trifluoroacetic acid. The intermediate tertiary carbenium ion undergoes an intramolecular amination to give 2,2-substituted pyrrolidines. The strength of the acid and the amine substituent are important factors to achieve high regioselectivity, suggesting intramolecular proton transfer from the