Efficient Syntheses of Oncinotine and Neooncinotine
摘要:
We have synthesized two natural alkaloids, oncinotine (1) and neooncinotine (2), by means of efficient ring-closing metathesis (RCM) reactions. The required dienes for RCM were assembled from three basic components: 2-allylpiperidine (5), 9-decenoic acid (6), and diamines 7. We developed two different methods to achieve the linkage: the Michael addition of acrylamide and two amidations of succinic anhydride. The Grubbs catalyst was used to form the 17- and 18-membered lactams in 50% and 68% yields, respectively.
[EN] METHOD OF CYCLIC COMPOUNDS PRODUCTION IN OLEFINE METATHESIS REACTION AND USE OF RUTHENIUM CATALYSTS IN PRODUCTION OF CYCLIC OLEFINS IN OLEFINE METATHESIS REACTION<br/>[FR] PROCÉDÉ DE PRODUCTION DE COMPOSÉS CYCLIQUES DANS UNE RÉACTION DE MÉTATHÈSE D'OLÉFINES ET UTILISATION DE CATALYSEURS AU RUTHÉNIUM DANS LA PRODUCTION D'OLÉFINES CYCLIQUES DANS UNE RÉACTION DE MÉTATHÈSE D'OLÉFINES
申请人:UNIV WARSZAWSKI
公开号:WO2018197963A1
公开(公告)日:2018-11-01
The invention relates to a method for the preparation of cyclic compounds in the metathesis of olefins from acyclic dienes comprising terminal and/or non-terminal C=C double bonds; the invention also relates to the use of homogeneous ruthenium complexes and homogeneous ruthenium complexes deposited on a solid support as catalysts and/or pre-catalysts for the preparation of cyclic olefins in olefin metathesis reactions. Formula (I)
Discovery of a Potent, Selective, and Efficacious Class of Reversible α-Ketoheterocycle Inhibitors of Fatty Acid Amide Hydrolase Effective as Analgesics
作者:Dale L. Boger、Hiroshi Miyauchi、Wu Du、Christophe Hardouin、Robert A. Fecik、Heng Cheng、Inkyu Hwang、Michael P. Hedrick、Donmienne Leung、Orlando Acevedo、Cristiano R. W. Guimarães、William L. Jorgensen、Benjamin F. Cravatt
DOI:10.1021/jm049614v
日期:2005.3.1
Herein we report the discovery of a potent, selective, and efficacious class of reversible FAAH inhibitors that produce analgesia in animal models validating a new therapeutic target for pain intervention. Key to the useful inhibitordiscovery was the routine implementation of a proteomics-wide selectivity screen against the serine hydrolase superfamily ensuring selectivity for FAAH coupled with systematic
Deuterium and Tritium Labelling of<i>N</i>-Acyl-<scp>L</scp>-homoserine Lactones (AHLs) by Catalytic Reduction of a Double Bond in the Layer-by-Layer Method
and tritium-labelled AHLs were synthesized in an effort to detect the cellular distribution and monitor the membrane transport of AHLs. Most tritiumlabellingmethods use tritium gas, which is difficult to handle, however, here we present a novel, gas-free method with which to obtain deuterium- and tritium-label terminally unsaturated AHLs through catalytic reduction of the double bond. This uncommon
N-酰基-L-高丝氨酸内酯 (AHL) 是在革兰氏阴性细菌中发现的信号分子,使细菌能够通过群体感应相互交流,并通过跨界信号与它们的真核宿主细胞进行交流。对跨界信号机制知之甚少。合成了氘和氚标记的 AHL,以检测细胞分布并监测 AHL 的膜转运。大多数氚标记方法使用氚气,这很难处理,但是,在这里我们提出了一种新的无气体方法,通过双键的催化还原获得氘和氚标记的末端不饱和 AHL。这种罕见的双键还原使用硼氢化钠-[2H] 或硼氢化钠-[3H],并在乙酸钯 (II) 存在下进行,乙酸钯 (II) 在独特的逐层系统中充当催化剂。此外,还提供了对所得同位素体的详细核磁共振分析。
At Long Last: Olefin Metathesis Macrocyclization at High Concentration
Macrocyclic lactones, ketones, and ethers can be obtained in the High-Concentration Ring-Closing Metathesis (HC-RCM) reaction in high yield and selectivity at concentrations 40 to 380 times higher than those typically used by organic chemists for similar macrocyclizations. The new method consists of using tailored ruthenium catalysts together with applying vacuum to distill off the macrocyclic product
rectal musk glands which often led to the death of the animals. Recently, a lot of effort was invested to obtain such macrocycles in a synthetic way. This research presents a study on the preparation of macrocyclic lactones with the musk scent by ring‐closing metathesis (RCM) using biomass‐derived starting materials: oleic and 9‐decenoic acid. An experimental rule correlating the C–C double bond substitution