用于正电子发射断层扫描 (PET) 的腺苷受体 (AR) 放射性示踪剂提供了关于AR 在中枢神经系统 (CNS)中的体内生物分布的知识,这对各种神经精神疾病具有治疗意义。此外,仍然缺乏能够成像不同生理和病理条件下内源性腺苷水平变化的放射性配体。在啮齿动物 PET 研究中,已知拮抗剂腺苷 A 1受体 (A 1 R) 放射性示踪剂 [ 11 C]MDPX 的结合未能被升高的内源性腺苷抑制。由于大多数已知的 AR PET 放射性示踪剂都是拮抗剂,我们建议 A 1R 激动剂放射性配体可能对测量内源性腺苷浓度的变化具有更高的灵敏度。在此,我们报告了我们在开发用于 PET 的完全激动剂腺苷 A 1放射性配体方面的最新发现。基于 3,5-二氰基吡啶模板,设计和合成了 16 种新衍生物以优化结合亲和力和功能活性,从而产生了两种具有单位数纳摩尔亲和力和良好亚型选择性的完全激动剂(化合物27和29 )(A 1
ylides derived from short-chain trialkylphosphines in the Wittig-type olefinationreactions toward the synthesis of alkenes, including stilbenes, styrenes, and 1,3-dienes, as well as reagents for homologation reactions, are described. The methods allow easy access to alkenes with high (E)-stereoselectivity in good yield. These reactions are conducted with weak bases in aqueous media, which allows easy
[EN] IMIDAZOLYLKETONE DERIVATIVES ASD ALDOSTERONE SYNTHASE INHIBITORS<br/>[FR] DÉRIVÉS D'IMIDAZOLYLCÉTONE EN TANT QU'INHIBITEURS DE L'ALDOSTÉRONE SYNTHASE
申请人:HOFFMANN LA ROCHE
公开号:WO2013120771A1
公开(公告)日:2013-08-22
The invention provides novel compounds having the general formula (I), wherein R1, R2, R3 and R4 n are as described herein, compositions including the compounds and methods of using the compounds as inhibitors of aldosterone synthase.
The invention provides novel compounds having the general formula (I)
wherein R
1
, R
2
, R
3
and R
4
n are as described herein, compositions including the compounds and methods of using the compounds.
organocatalytic reaction between propargyl alcohols and trialkenylboroxines. Our strategy relies on acid‐mediated generation of the carbocationic intermediate from propargyl alcohols followed by enantioselective alkenylation with trialkenylboroxines. A range of chiral 1,4‐enynes were obtained in moderate to good yields with high levels of enantioselectivity. Use of a highly acidic chiral N‐triflyl phosphoramide
Amide Bond Formation through Iron-Catalyzed Oxidative Amidation of Tertiary Amines with Anhydrides
作者:Yuanming Li、Lina Ma、Fan Jia、Zhiping Li
DOI:10.1021/jo400804p
日期:2013.6.7
for synthesis of tertiary amides from readily available tertiary amines and anhydrides in the presence of FeCl2 as catalyst and tert-butyl hydroperoxide in water (T-Hydro) as oxidant. Mechanistic studies indicated that the in situ-generated α-amino peroxide of tertiary amine and iminium ion act as key intermediates in this oxidative transformation.