结合富马酸酯和CO配体的环戊二烯钴复合物(见图)有效地催化炔烃,腈和/或烯烃的分子间和分子内[2 + 2 + 2]环加成反应,从而生成苯,吡啶或1,3-环己二烯。与[CpCo(CO)2 ]或[CpCo(C 2 H 4)2 ](Cp = C 5 H 5)等催化剂不同,它们具有空气稳定性,易于处理,与微波条件兼容,并且不一定需要辐射才能活跃。
[EN] PHOTOCHROMIC AND ELECTROCHROMIC DIARYLETHENE COMPOUNDS WITH IMPROVED PHOTOSTABILITY AND SOLUBILITY<br/>[FR] COMPOSÉS DIARYLÉTHÈNE PHOTOCHROMIQUES ET ÉLECTROCHROMES PRÉSENTANT UNE PHOTOSTABILITÉ ET UNE SOLUBILITÉ AMÉLIORÉES
申请人:SWITCH MAT INC
公开号:WO2020198868A1
公开(公告)日:2020-10-08
A diarylethene compound reversibly convertible under photochromic and electrochromic conditions between a ring-open isomer of Formula (1A) and a ring-closed isomer of Formula (IB) wherein R5 is a substituted phenyl ring and Re is a substituted thiophene ring is provided. The photochromic-electrochromic diarylethene compound of Formula (1A)/(1B) have improved photochromic, electrochromic or photochromic and electrochromic properties, and is useful to provide variation of the light transmission properties of optical filters. The compound also possesses improved solubility making it suitable for incorporation in commercial products..
Professor Dieter Enders. Abstract The synthesis of polyfunctionalized indolizidines from pipecolinic acid alkyl ester derivatives, aldehydes and a wide range of dipolarophiles by multicomponent 1,3-dipolarcycloadditions is developed in a diastereoselective manner. The cycloadditions take place in toluene with short reaction times at 70 °C, giving good yields. The synthesis of these fused heterocycles is
This application relates to derivatives of hydrocarbon terpenes (e.g., myrcene or farnesene), to methods of making the derivatives, and to the use of the derivatives as surfactants.
An Improved Catalyst System for the Iron-Catalyzed Intermolecular Ring-Expansion Reactions of Epoxides
作者:Gerhard Hilt、Patrick Bolze、Klaus Harms
DOI:10.1002/chem.200601747
日期:2007.5.18
oxide derivatives, acting as radical donors, as well as to a wide variety of acceptor-substituted acyclic alkenes and cyclic dienes that act as radical acceptors. The use of unsymmetrical radical acceptors led to interesting questions concerning the regiochemistry of the reactions. The conservation of the stereochemistry of the starting materials in the products was investigated through a study of the
Hydrogen Atom Transfer Reactions via Photoredox Catalyzed Chlorine Atom Generation
作者:Samantha Rohe、Avery O. Morris、Terry McCallum、Louis Barriault
DOI:10.1002/anie.201810187
日期:2018.11.26
waste‐limiting, and atom‐economical. The catalytic generation of chlorineatoms from chloride ions is one of the most challenging redox processes, where the requirement of harsh and oxidizing reaction conditions renders it seldom utilized in synthetic applications. We report the mild, controlled, and catalytic generation of chlorineatoms as a new opportunity for access to a wide variety of hydrogen atom transfer