Potent Kv1.3 inhibitors from correolide—modification of the C18 position
摘要:
Kv1.3, the voltage-gated potassium channel in human T cells, represents a new target for treating immunosuppression and autoimmune diseases. Correolide (1), a pentacyclic natural product, is a potent and selective Kv1.3 channel blocker. Simplification of correolide via removal of its E-ring generates enone 4, whose modification produced a new series of tetracyclic Kv1.3 blockers. The structure-activity relationship for this class of compounds in two functional assays, Rb_Kv and human T cell proliferation, is presented herein. The most potent analog 43 is 15-fold more potent than correolide as inhibitor of human T cell proliferation. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis of Prolyl Endopeptidase Inhibitors and Evaluation of Their Structure-Activity Relationships: In Vitro Inhibition of Prolyl Endopeptidase from Canine Brain.
摘要:
通过对一种已知的脯氨酰内肽酶(PEP)抑制剂(N-[N-(4-苯基丁酰基)-L-脯氨酰]吡咯烷;SUAM-1221)进行化学修饰,合成了几种芳基烷酰基衍生物(V-1-27),并测试了其对犬脑中 PEP 的体外抑制活性。其中,4-(2-噻吩基)丁酰衍生物(V-24-27)显示出比 SUAM-1221 更强的 PEP 抑制活性。本文讨论了这些化合物的结构-活性关系。
Organocatalyzed Formal [4+2] Cycloaddition of<i>in situ</i>Generated Azoalkenes with Arylacetic Acids: An Efficient Approach to the Synthesis of 4,5-Dihydropyridazin-3(2<i>H</i>)-ones
作者:Xuanyi Li、Kuo Gai、Zhenbo Yuan、Jie Wu、Aijun Lin、Hequan Yao
DOI:10.1002/adsc.201500645
日期:2015.11.16
An unprecedented [4+2] cycloaddition of in situ generated azoalkenes with arylaceticacids has been developed under the catalysis of isothiourea. The reaction provided an efficientapproach to the synthesis of 4,5-dihydropyridazin-3(2H)-one derivatives in moderate to good yields (up to 95%).
Diastereoselective Aza‐Mislow–Evans Rearrangement of
<i>N</i>
‐Acyl
<i>tert</i>
‐Butanesulfinamides into α‐Sulfenyloxy Carboxamides
作者:Fan Tang、Yun Yao、Yan‐Jun Xu、Chong‐Dao Lu
DOI:10.1002/anie.201809551
日期:2018.11.19
diastereoselective [2,3] rearrangement of O‐silyl N‐sulfinyl N,O‐ketene acetals derived from chiral N‐acyl tert‐butanesulfinamides was developed, giving α‐sulfenyloxy carboxamides with excellent enantioselectivity. Enolization and subsequent silylation of N‐acyl tert‐butanesulfinamides initiate this aza variant of the Mislow–Evans rearrangement, in which the chirality at the sulfur atom in the rearrangement precursors
Organocatalytic Michael addition–lactonisation of carboxylic acids using α,β-unsaturated trichloromethyl ketones as α,β-unsaturated ester equivalents
作者:Louis C. Morrill、Daniel G. Stark、James E. Taylor、Siobhan R. Smith、James A. Squires、Agathe C. A. D'Hollander、Carmen Simal、Peter Shapland、Timothy J. C. O'Riordan、Andrew D. Smith
DOI:10.1039/c4ob01788a
日期:——
Isothiourea HBTM-2.1 catalyses the Michael addition–lactonisation of 2-aryl and 2-alkenylacetic acids and α,β-unsaturated trichloromethyl ketones. Ring-opening of the resulting dihydropyranones and subsequent alcoholysis of the CCl3 ketone with an excess of methanol gives a range of diesters in high diastereo- and enantioselectivity (up to 95 : 5 dr and >99% ee). Sequential addition of two different
[EN] HYDANTOIN DERIVATIVES FOR USE AS TACE AND AGGRECANASE INHIBITORS<br/>[FR] DERIVES D'HYDANTOINE DESTINES A ETRE UTILISES EN TANT QU'INHIBITEURS DE TACE ET DE L'AGGRECANASE
申请人:ASTRAZENECA AB
公开号:WO2005085232A1
公开(公告)日:2005-09-15
Hydantoin derivatives of formula (I) that are useful in the inhibition of metalloproteinases and in particular in the inhibition of TNF-α Converting Enzyme (TACE), aggrecanase or the combination thereof.
Dihydropyridones: Catalytic Asymmetric Synthesis, N- to C-Sulfonyl Transfer, and Derivatizations
作者:Carmen Simal、Tomas Lebl、Alexandra M. Z. Slawin、Andrew D. Smith
DOI:10.1002/anie.201109061
日期:2012.4.10
promotes the reaction of ammonium enolates derived from arylacetic acids with N‐tosyl‐α,β‐unsaturated ketimines, thus giving dihydropyridones with high diastereo‐ and enantiocontrol (see scheme). These products readily undergo N‐ to C‐sulfonyl photoisomerization and are derivatized to afford stereodefined piperidines and tetrahydropyrans.