Oxabenzomorphane: Synthese von 4-Phenyl-tetrahydropyran-2-carbonsäuren
作者:Fritz Eiden、Walter Winkler
DOI:10.1002/ardp.19863190806
日期:——
Durch [4+2]‐Cycloaddition der Enamine 6a–6f mit den Benzylidenbrenztraubensäureestern 7a–7g entstehen die 6‐Amino‐4‐phenyl‐dihydropyran‐2‐carbonsäureester 8a–8p. Aus 8d wird durch Hydrolyse, Wasserabspaltung und katalytische Hydrierung die 4‐Phenyl‐tetrahydropyran‐2‐carbonsäure 12a gewonnen.
Iridium/f-Amphox-Catalyzed Asymmetric Hydrogenation of Styrylglyoxylamides
作者:Jialin Wen、Xumu Zhang、Simin Wang、Yuena Yu
DOI:10.1055/s-0037-1609623
日期:2018.10
We report an iridium-catalyzedasymmetrichydrogenation reaction for the preparation of chiral homophenylalanine derivatives. Catalyzed by an iridium/f-amphox complex, the asymmetrichydrogenation of styrylglyoxylamides was conducted smoothly with turnover numbers of up to 10,000 and up to 98% ee. This method was successfully applied in a synthesis of a fragment of benazepril, a drug used for the treatment
[EN] PYRIDAZINONE COMPOUNDS AS CALCILYTICS<br/>[FR] COMPOSES DE PYRIDAZINONE SERVANT DE CALCILYTIQUES
申请人:NPS PHARMA INC
公开号:WO2007044796A2
公开(公告)日:2007-04-19
[EN] Various calcilytic compounds and pharmaceutical compositions containing these compounds are disclosed. Calcilytic compounds are compounds capable of inhibiting calcium receptor activity. Methods for preparing calcilytic compounds, oral bioavailability of calcilytic compounds, and their use as calcium receptor antagonists are also disclosed. [FR] L'invention concerne des composés calcilytiques variés et des compositions pharmaceutiques contenant ces composés. Les composants calcilytiques de l'invention sont des composés permettant d'inhiber l'activité du récepteur de calcium. L'invention concerne également des méthodes pour préparer des composés calcilytiques. La biodisponibilité orale des composés calcilytiques de l'invention et l'utilisation de ces composés en tant qu'antagonistes du récepteur de calcium sont également décrites dans la description.
Highly-luminescent DTTA-appended lanthanide complexes of 4-(multi)fluoroaryl-2,2′-bipyridines: Synthesis and photophysical studies
作者:Alexey P. Krinochkin、Dmitry S. Kopchuk、Grigory A. Kim、Vadim A. Shevyrin、Ilya N. Egorov、Sougata Santra、Emiliya V. Nosova、Grigory V. Zyryanov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.1016/j.poly.2020.114962
日期:2021.2
Biocatalytic Synthesis of α,β-Unsaturated 2-Keto Acids and Derivatives Using the Promiscuous Aldolase, NahE
作者:David R. J. Palmer、Douglas J. Fansher、Niza Ngwira、Ahmad Reza Salehi、Jerome Woods、Amanda Cascão
DOI:10.1055/a-1953-1509
日期:2023.1
Type I aldolases catalyze carbon–carbon bond-forming reactions to form a diverse set of products in nature but often display high selectivity for their natural substrates. One such aldolase, NahE, is known to catalyze the condensation of pyruvate with a wide range of aldehydes to give trans-4-phenyl-2-oxo-3-butenoic acids under mild aqueous conditions. These α,β-unsaturated 2-oxo acids are versatile
I 型醛缩酶催化碳-碳键形成反应,在自然界中形成多种产物,但通常对其天然底物表现出高选择性。已知其中一种醛缩酶 NahE 可催化丙酮酸与多种醛的缩合反应生成反式-4-苯基-2-氧代-3-丁烯酸在温和的水性条件下。这些 α,β-不饱和 2-氧代酸是用于合成转化的通用中间体。NahE 还用于合成 α-氟代-β-羟基酯、β-羟基酯和喹醛酸。然而,尚未对天然 NahE 催化的醛醇缩合反应进行实际规模的底物范围的彻底研究。在这里,我们报告 NahE 可以接受 >35(杂)芳香族和脂肪族醛。大多数来自取代苯甲醛的缩合产物的分离产率 > 95%,无需进一步纯化,而非苯甲醛底物的相应产物的分离产率在 26% 和 98% 之间。反应可以以克级进行。这些产品可以转换成α,β-不饱和羧酸在两个步骤中的产率高达 93%。该反应序列也使用全细胞进行,产率高达 79%。这项工作表明,NahE 是一种稳健、高效且用途广泛的有机合成催化剂。