[EN] ISATOIC ANHYDRIDE DERIVATIVES AND APPLICATIONS THEREOF<br/>[FR] DÉRIVÉS D'ANHYDRIDE ISATOÏQUE ET LEURS APPLICATIONS
申请人:UNIV NORTH CAROLINA
公开号:WO2015163952A1
公开(公告)日:2015-10-29
Isatoic anhydride derivatives having an N-substituent which includes a quaternary ammonium group are useful for labeling and/or functionalizing a target material and/or for coupling materials together. The isatoic anhydride derivatives of the present disclosure can be advantageously water soluble, easily prepared and purified. Isatoic anhydride derivatives useful in the present disclosure preferably have at least one chemically reactive group or at least one binding group or at least one detectable label. Anthranilate derivatives made from the isatoic anhydrides derivatives or otherwise and kits including the isatoic anhydride derivatives are also disclosed.
[reaction: see text] Intermolecular enynemetathesis reaction of alkynes with olefins catalyzed by second-generation Grubbs catalyst (1) proceeded stereoselectively under ethylene atmosphere to produce 1,3-disubstituted butadienes with E stereochemistry.
An Atom-Economic and Stereospecific Access to Trisubstituted Olefins through Enyne Cross Metathesis Followed by 1,4-Hydrogenation
作者:Hans-Günther Schmalz、Friederike Ratsch
DOI:10.1055/s-0036-1591528
日期:2018.4
The combination of intermolecular enyne cross metathesis and subsequent 1,4-hydrogenation opens a stereocontrolled and atom-economic access to trisubstituted olefins. By investigating different combinations of functionalized alkyne and alkene substrates, we found that the outcome (yield, E / Z ratio) of the Grubbs II-catalyzed enyne cross-metathesis step depends on the substrate’s structure, the amount
deoxygenation of terminal and internal epoxides to the respective olefins is presented. This reaction is homogeneously catalyzed by a carbonyl pincer‐iridium(I) complex in combination with a Lewis acid co‐catalyst to achieve a pre‐activation of the epoxide substrate, as well as the elimination of CO2 from a γ‐2‐iridabutyrolactone intermediate. Especially terminal alkyl epoxides react smoothly and without significant
提出了使用一氧化碳作为直接还原剂将末端环氧化物和内部环氧化物脱氧成相应的烯烃。该反应由羰基钳-铱(I)络合物与路易斯酸助催化剂结合均匀催化,实现环氧化物底物的预活化,以及从γ-2-铱丁内酯中消除CO 2中间的。特别是末端烷基环氧化物在CO气氛下、苯或甲苯中、80-120℃下反应顺利,并且不会明显异构化为内烯烃。详细的研究揭示了环氧化物C−O键活化机制中底物依赖性变化,该变化发生在保留构型的氧化加成和导致构型反转的S N 2 反应之间。