Carbomethoxylation of epichlorohydrin with cobalt carbonyl and glycidyltrimethylammonium halide co-catalysts. New synthesis of alkali-sensitive epoxides
申请人:CJ CheilJedang Corporation 씨제이제일제당 (주)(120070374352) Corp. No ▼ 110111-3748253BRN ▼104-86-09535
公开号:KR20150118287A
公开(公告)日:2015-10-22
본 발명은 호모세린계 화합물로부터 산업계에서 중요한 화합물의 제조에 중간체로 사용할 수 있는 유용한 화합물을 제조하는 것에 관한 것으로, 간단하고 우수한 효율로 호모세린계 화합물로부터 유용한 화합물을 대량 생산할 수 있는 호모세린계 화합물의 처리 공정을 제공하기 위한 것이다.
This is the translation of the text into Chinese:
本发明涉及从同系列化合物中制备可用作工业中重要化合物的中间体的有用化合物,旨在提供一种从同系列化合物中大规模生产有用化合物的简单且高效的处理工艺。
Mutanobactin D from the Human Microbiome: Total Synthesis, Configurational Assignment, and Biological Evaluation
作者:Felix Pultar、Moritz E. Hansen、Susanne Wolfrum、Lennard Böselt、Ricardo Fróis-Martins、Susanne Bloch、Alberto G. Kravina、Deren Pehlivanoglu、Christina Schäffer、Salomé LeibundGut-Landmann、Sereina Riniker、Erick M. Carreira
DOI:10.1021/jacs.1c04825
日期:2021.7.14
formation of the pathogenic yeast Candida albicans. We report the first totalsynthesis of this natural product, which relies on enantioselective, zinc-mediated 1,3-dipolar cycloaddition and a sequence of cascading reactions, providing the key lipidated γ-amino acid found in mutanobactin D. The synthesis enables configurational assignment, determination of the dominant solution-state structure, and
Mutanobactin D 是一种从变形链球菌中分离出来的非核糖体环肽,具有减少酵母菌向菌丝转化以及致病性酵母白色念珠菌生物膜形成的活性. 我们报告了这种天然产物的首次全合成,该合成依赖于对映选择性、锌介导的 1,3-偶极环加成反应和一系列级联反应,提供了 mutanobactin D 中发现的关键脂化 γ-氨基酸。该合成实现了构型分配,确定主要溶液状态结构,并研究评估天然产物中发现的脂肽亚结构的稳定性。存储在 IR 光谱指纹区域中的信息与量子化学计算相结合证明是区分 α-取代的 β-酮酰胺差向异构体的关键。合成的 mutanobactin D 推动发现和分析其对人类口服联合体其他成员生长的影响。
Base-Promoted Cycloaddition of γ-Hydroxy- and δ-Hydroxy-α,β-Unsaturated Carbonyls with Azaoxyallyl Cations: Rapid Synthesis of <i>N,O</i>
-Heterocycles
作者:Eun Chae Son、Jiseon Lee、Sung-Gon Kim
DOI:10.1002/ejoc.202000368
日期:2020.5.29
The synthesis of morpholin‐3‐one and 1,4‐oxazepan‐3‐one skeletons was achieved by the cycloaddition reaction of alcohol‐tethered enones and α‐halohydroxamates. This process proceeds through the addition of the hydroxyl group in the enone to an in‐situ generated azaoxyallyl cation followed by intramolecular aza‐Michael‐type trapping. Morpholin‐3‐ones and 1,4‐oxazepan‐3‐ones could be generated from γ‐hydroxy
Ammonium-tagged ruthenium-based catalysts for olefin metathesis in aqueous media under ultrasound and microwave irradiation
作者:Łukasz Gułajski、Andrzej Tracz、Katarzyna Urbaniak、Stefan J Czarnocki、Michał Bieniek、Tomasz K Olszewski
DOI:10.3762/bjoc.15.16
日期:——
performance of ammonium-tagged Ru-based catalysts in olefin metathesis transformations in aqueous media was studied. Differences in the catalytic activity in correlation with the nature of the present counter ion and the size of the N-heterocycliccarbene (NHC) ligand were revealed. The presented methodology allows for preparation of a variety of polar and non-polar metathesis products under environmentally
insertion/asymmetric Claisen rearrangement tandem reaction of N‐sulfonyl‐1,2,3‐triazoles with allyl alcohol esters was achieved by bimetallic relay catalytic systems involving achiral rhodium salt and chiral N,N′‐dioxide–indium(III) complex. This manifold could overcome the limitation of single RhII catalysis, providing a straight and facileroute to various enantioenriched β/γ‐amino acid derivatives