具有三足硅烷醇配体的亚烷基钼属于迄今为止已知的最具活性和选择性的炔复分解催化剂。本文描述了新一代产品,其特点是前所未有的稳定性和实用性,同时又不牺牲前代产品的化学优点。具体来说, 16型吡啶加合物很容易以克级制备,可以在空气中常规称重和处理,并且在手套箱外可以保持完好数月。然而,当溶解在甲苯中时,稳定吡啶配体的自发解离释放出具有优异性能和官能团耐受性的活性物质。具体来说,许多极性和非极性基团、各种质子位点和许多基本官能团被证明是兼容的。通过晶体学和光谱手段(包括95 Mo NMR)对催化剂进行了表征;它们的活性和稳定性进行了详细的基准测试,并且通过天然产物合成的高级应用来说明其有利特性。由于良好的整体应用特性和易于处理,该新系列的配合物预计将取代早期的催化剂,并有助于鼓励更频繁地使用炔复分解反应。
[DE] 3-(4-PIPERIDIN-1YLMETHYL-PHENYL) -PROPIONSÄURE-PHRNYLAMID-DERIVATE UND VERWANDTE VERBINDUNGEN ALS MCH (MELANINE CONCENTRATING HORMONE) ANTAGONISTEN ZUR BEHANDLUNG VON ESSSTÖRUNGEN [EN] 3-(4-PIPERIDINE-1YLMETHYL-PHENYL)-PROPION ACID-PHENYLAMIDE-DERIVATIVES AND RELATED COMPOUNDS USED IN THE FORM OF MCH ANTAGONISTS (MELANINE CONCENTRATING HORMONE) FOR TREATING EATING DISORDERS [FR] DERIVES D'ACIDE 3-(4-PIPERIDINE-1YLMETHYL-PHENYL) PROPIONIQUE-PHENYLAMIDE ET COMPOSES APPARENTES, UTILISES COMME ANTAGONISTES MCH (HORMONE DE CONCENTRATION EN MELANINE) POUR LE TRAITEMENT DE TROUBLES DUS A L'ALIMENTATION
Structure and Reactivity of Half-Sandwich Rh(+3) and Ir(+3) Carbene Complexes. Catalytic Metathesis of Azobenzene Derivatives
作者:Daniel J. Tindall、Christophe Werlé、Richard Goddard、Petra Philipps、Christophe Farès、Alois Fürstner
DOI:10.1021/jacs.7b12673
日期:2018.2.7
Specifically, the donor/acceptor carbene 10a derived from ArC(═N2)COOMe and [Cp*RhCl2]2 undergoes spontaneous 1,2-migratory insertion of the emerging carbene unit into the Rh-Cl bond with formation of the C-metalated rhodium enolate 11. In contrast, the analogous complexes 10b,c derived from [Cp*RhX2]2 (X = Br, I) as well as the iridium species 13 and 14 derived from [Cp*IrCl2]2 are sufficiently stable
[EN] UREA DERIVATIVE MODULATORS OF TRYPTOPHAN CATABOLISM<br/>[FR] MODULATEURS DÉRIVÉS D'URÉE DU CATABOLISME DU TRYPTOPHANE
申请人:E THERAPEUTICS PLC
公开号:WO2019229464A1
公开(公告)日:2019-12-05
There are described compounds of formula (I): (I) and their use as a medicament in the treatment of diseases associated with the abnormal or elevated catabolism of tryptophan, such as, cancer, immunosuppression, viral infection, depression, a neurodegenerative disorder, trauma, age-related cataracts, organ transplant rejection, or an autoimmune disorder in a patient.
A Two-Component Alkyne Metathesis Catalyst System with an Improved Substrate Scope and Functional Group Tolerance: Development and Applications to Natural Product Synthesis
作者:Sebastian Schaubach、Konrad Gebauer、Felix Ungeheuer、Laura Hoffmeister、Marina K. Ilg、Conny Wirtz、Alois Fürstner
DOI:10.1002/chem.201601163
日期:2016.6.13
standard catalyst 1 largely failed to effect the critical macrocyclization, whereas the two‐component system was fully operative. A study directed toward the quinolizidine alkaloid lythrancepine I features yet another instructive example, in that a triyne substrate was metathesized with the help of 3/11 such that two of the triple bonds participated in ring closure, while the third one passed uncompromised
Alkyne metathesis with simple catalyst systems: High yield dimerization of propynylated aromatics; scope and limitations
作者:Neil Gregory Pschirer、Uwe H.F. Bunz
DOI:10.1016/s0040-4039(99)00282-8
日期:1999.3
yield dimerization of propynylated benzenes and propynylnaphthalene by a mixture of Mo(CO)6 and 4-chlorophenol at 140 °C in 1,2-dichlorobenzene is reported to give the corresponding disubstituted alkynes. The scope and limitation of the reaction and the influence of substitution pattern and substitution type are discussed. Oxygen or nitrogen carrying substrates metathesize in moderate to good yields
Robust Alkyne Metathesis Catalyzed by Air Stable d<sup>2</sup> Re(V) Alkylidyne Complexes
作者:Mingxu Cui、Wei Bai、Herman H. Y. Sung、Ian D. Williams、Guochen Jia
DOI:10.1021/jacs.0c06581
日期:2020.8.5
We report in this communication the first example of catalytic alkynemetathesisreactions mediated by well-defined non-d0 alkylidyne complexes. The air-stable d2 Re(V) alkylidyne complex Re4, bearing two PO-chelating ligands and a labile pyridine ligand, could catalyze homo-metathesis of internal alkynes with a broad substrate scope, including alcohols, amines and even carboxylic acids. The catalyst
我们在此通讯中报告了由明确定义的非 d0 烷炔配合物介导的催化炔复分解反应的第一个例子。空气稳定的 d2 Re(V) 亚烷基配合物 Re4,带有两个 PO 螯合配体和一个不稳定的吡啶配体,可以催化具有广泛底物范围的内炔的均位复分解,包括醇、胺甚至羧酸。该催化剂在固体和溶液状态下都可以耐受加热、空气和水分,催化复分解反应可以在湿溶剂中正常进行。