32122-11-5Relevant articles and documents
AUTOMATED DIAZOMETHANE GENERATOR, REACTOR AND SOLID PHASE QUENCHER
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Page/Page column 14-16, (2022/03/09)
An automated apparatus (Diazo-M-pen and Diazo-M-cube) for production, utilization and quenching of highly toxic diazomethane comprising of integrated pumps, tubular flow reactor, liquid-liquid micro-separator, solid MOF quencher etc.
Electro-Oxidative Selective Esterification of Methylarenes and Benzaldehydes
Yu, Congjun,?zkaya, Bünyamin,Patureau, Frederic W.
supporting information, p. 3682 - 3687 (2021/02/01)
A mild and green electro-oxidative protocol to construct aromatic esters from methylarenes and alcohols is herein reported. Importantly, the reaction is free of metals, chemical oxidants, bases, acids, and operates at room temperature. Moreover, the design of the electrolyte was found critical for the oxidation state and structure of the coupling products, a rarely documented effect. This electro-oxidative coupling process also displays exceptional tolerance of many fragile easily oxidized functional groups such as hydroxy, aldehyde, olefin, alkyne, as well as neighboring benzylic positions. The enantiomeric enrichment of some chiral alcohols is moreover preserved during this electro-oxidative coupling reaction, making it overall a promising synthetic tool.
Multichiral liquid crystals based on terphenyl core laterally substituted by chlorine atom
Cigl, Martin,Hamplová, Věra,Novotná, Vladimíra,Pociecha, Damian,Podoliak, Natalia
, (2021/05/17)
We designed a new type of antiferroelectric liquid crystalline structure with versatile properties. For this purpose, we modified the previously studied liquid crystalline compounds based on terphenyl molecular core laterally substituted with a chlorine atom. Two lactate units were attached to the chiral chain with the aim to support antiferroelectric structures. We studied the mesomorphic properties of new compounds by means of texture observations under a polarised light microscope, by dielectric spectroscopy and electro-optical measurements. To confirm the phase identification, x-ray measurements were performed. We found that the studied compounds revealed a SmA*-SmC* phase sequence in a broad temperature range. We proved an antiferroelectric phase with orthoconic properties for selected structural modifications. Such valuable optical properties with the tilt angle about 45° promise a big potential for applications.