An alternative synthetic approach for the introduction of chirality in β-carboline moiety through in situ reduction of N-acyliminium ion intermediates generated from imine 2 and chloroformate of 8-phenylmenthyl as chiral auxiliary was achieved. The method applied microwave-assisted irradiation and used PdCl2/Et3SiH protocol as a mild reducing agent, which decreased reaction times to minutes when compared
通过原位还原由亚胺2和8-苯基薄荷基的氯甲酸酯作为手性助剂生成的N-酰基亚胺离子中间体,实现了另一种在β-咔啉部分中引入手性的合成方法。该方法采用微波辅助辐射,并使用PdCl 2 / Et 3 SiH协议作为温和的还原剂,与常规的热反应相比,该方法将反应时间缩短至数分钟。还原产生的R-胺的非对映选择性(4-12:1),与从Noyori不对称氢化催化剂获得的产物相比,在手性辅助去除和光谱数据后将其分配。
[EN] NOVEL HDAC6 INHIBITORS AND THEIR USES<br/>[FR] NOUVEAUX INHIBITEURS DE HDAC6 ET LEURS UTILISATIONS
申请人:UNIVERSITÄT REGENSBURG
公开号:WO2016020369A1
公开(公告)日:2016-02-11
The present invention relates to small molecule compounds and their use as HDAC inhibitors and in the treatment of various diseases, such as cancer. The present invention further relates to methods of synthesizing the compounds and methods of treatment. H − L(HA), H is a head group selected from (head group 1), (head group 2), (head group 3), (head group 4), (head group 5) and (head group 6).
Cyclopropenones in the synthesis of indolizidine, pyrrolo[2,1-a]isoquinoline and indolizino[8,7-b]indole alkaloids
作者:Faisal Jamshaid、Vishnu V.R. Kondakal、C. Declan Newman、Rhianne Dobson、Heidi João、Craig R. Rice、Joseph M. Mwansa、Bimod Thapa、Karl Hemming
DOI:10.1016/j.tet.2020.131570
日期:2020.11
the synthesis of pyrrolo[1,2-a]isoquinolines from the reaction of aldimine dihydroisoquinolines with cyclopropenones, whereas ketimine based dihydroisoquinolines gave pyrrolo[1,2-a]isoquinolines without bridgehead oxidation. These results may have some significance for the origins of the bridgehead hydroxy natural products jenamidine B1/B2, clazamycin A/B and legonmycin A/B. The precursor cyclic aldimine
吲哚并咪唑天然产物粟精胺的尝试合成导致成功地将环丙烯酮添加到糖衍生的多羟基化环亚胺中,得到吲哚嗪酮产品,但是在粟精胺8a-桥头位置上安装了额外的羟基。这在我们以前对奥曲林和风信子吡咯并核苷天然产物的处理中也观察到。由醛亚胺二氢异喹啉与环丙烯酮反应合成吡咯并[1,2- a ]异喹啉时发生了相同的氧化现象,而酮亚胺基二氢异喹啉则产生了吡咯并[1,2- a]异喹啉,无桥头氧化。这些结果可能对桥头羟基天然产物啶B 1 / B 2,克拉扎霉素A / B和莱顿霉素A / B的起源具有重要意义。用于合成吲哚并[8,7- b ]吲哚的前体环状醛亚胺产生二聚吲哚并[8,7- b ]吲哚,而相应的环状酮亚胺表现出预期并得到吲哚并[8,7- b ]吲哚。与环丙烯酮反应后的核心。
Novel Supramolecular Palladium Catalyst for the Asymmetric Reduction of Imines in Aqueous Media
作者:Wender A. da Silva、Manoel T. Rodrigues、N. Shankaraiah、Renan B. Ferreira、Carlos Kleber Z. Andrade、Ronaldo A. Pilli、Leonardo S. Santos
DOI:10.1021/ol9011772
日期:2009.8.6
A novel approach to the asymmetric reduction of dihydro-β-carboline derivatives to the corresponding tetrahydro-β-carbolines is described based on the supramolecular lyophilized complex formed from β-cyclodextrin/imines as an enzyme mimetic and palladium hydride as the reducing agent. The methodology allowed us to develop a short and efficient preparation of (R)-harmicine and (R)-deplancheine alkaloids
USE OF CANTHIN-6-ONE AND ITS ANALOGS IN THE TREATMENT OF MYCOBACTERIA-LINKED PATHOLOGIES ( amended
申请人:Fournet Alain Robert Francois Maxime
公开号:US20110059977A1
公开(公告)日:2011-03-10
The present invention relates to the use, for the preparation of a medicament intended for the treatment or the prevention of pathologies linked to, or caused by mycobacteria, of at least one of the compounds of the following formula (I): in which B represents in particular a nitrogen atom, and R1, R2, R3, R4, R5, R6, R7 and R8 represent in particular a hydrogen atom.