A new approach to helical primary structures of four-membered rings: (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane
摘要:
A new approach to helical primary structures of four-membered rings uses a cycloaddition of a trimethylenketeniminium salt to suitable tailored methylenecyclobutanes to assemble the desired carbon framework. The results are short and effective syntheses of (M)-trispiro[3.0.0.3.2.2]tridecane [(M-5], and (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane [(P)- and (M)-24]. Unlike helices of three-membered rings, the specific rotation decreases, as the length of the helix increases. (C) 2003 Elsevier Ltd. All rights reserved.
A new approach to helical primary structures of four-membered rings: (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane
摘要:
A new approach to helical primary structures of four-membered rings uses a cycloaddition of a trimethylenketeniminium salt to suitable tailored methylenecyclobutanes to assemble the desired carbon framework. The results are short and effective syntheses of (M)-trispiro[3.0.0.3.2.2]tridecane [(M-5], and (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane [(P)- and (M)-24]. Unlike helices of three-membered rings, the specific rotation decreases, as the length of the helix increases. (C) 2003 Elsevier Ltd. All rights reserved.
A series of benzimidazole derivatives, being potent modulators of human TNFα activity, are accordingly of benefit in the treatment and/or prevention of various human ailments, including autoimmune and inflammatory disorders; neurological and neurodegenerative disorders; pain and nociceptive disorders; cardiovascular disorders; metabolic disorders; ocular disorders; and oncological disorders.
Imidazopyrazine Derivatives as Modulators of TNF Activity
申请人:UCB Biopharma SPRL
公开号:US20150191482A1
公开(公告)日:2015-07-09
A series of imidazo[1,2-α]pyrazine derivatives, being potent modulators of human TNFα activity, are accordingly of benefit in the treatment and/or prevention of various human ailments, including autoimmune and inflammatory disorders; neurological and neurodegenerative disorders; pain and nociceptive disorders; cardiovascular disorders; metabolic disorders; ocular disorder; and oncological disorders.
[EN] IMIDAZOPYRAZINE DERIVATIVES AS MODULATORS OF TNF ACTIVITY<br/>[FR] DÉRIVÉS D'IMIDAZOPYRAZINE EN TANT QUE MODULATEURS DE L'ACTIVITÉ TNF
申请人:UCB PHARMA SA
公开号:WO2014009296A1
公开(公告)日:2014-01-16
A series of imidazo[1,2-α]pyrazine derivatives, being potent modulators of human TNFα activity, are accordingly of benefit in the treatment and/or prevention of various human ailments, including autoimmune and inflammatory disorders; neurological and neurodegenerative disorders; pain and nociceptive disorders; cardiovascular disorders; metabolic disorders; ocular disorders; and oncological disorders.
Pd(II)-Catalyzed Enantioselective C(sp<sup>3</sup>)–H Arylation of Cyclopropanes and Cyclobutanes Guided by Tertiary Alkylamines
作者:Jesus Rodrigalvarez、Luke A. Reeve、Javier Miró、Matthew J. Gaunt
DOI:10.1021/jacs.1c11921
日期:2022.3.9
simple N-acetyl amino acid ligand, which not only controls the enantioselectivity but also promotes γ-C–H activation of over other pathways. Computational analysis of the cyclopalladation step provides an understanding of how enantioselective C–H cleavage occurs and revealed distinct transition structures to our previous work on enantioselective desymmetrization of N-isobutyl tertiary alkylamines. This
Synthesis of Highly Substituted Cyclobutanones by a One‐Pot Keteniminium‐Enamine Process
作者:Dylan Dagoneau、Amandine Kolleth、Pierre Quinodoz、Beyza Horoz、Saron Catak、Alexandre Lumbroso、Sarah Sulzer‐Mossé、Alain De Mesmaeker
DOI:10.1002/hlca.202100022
日期:2021.5
synthesis of highly substitutedcyclobutanones. This process relies on first a [2+2] cycloaddition involving a keteniminium salt intermediate with an alkene followed by isomerization of the resulting cyclobutaniminium salt into its cyclic enamine form and then reaction of the latter with an electrophile. The adduct can be either hydrolyzed or reduced to give the corresponding cyclobutanone or cyclobutanamine