Metal-Free Trifluoromethylation of Aromatic and Heteroaromatic Aldehydes and Ketones
作者:Yupu Qiao、Tuda Si、Ming-Hsiu Yang、Ryan A. Altman
DOI:10.1021/jo501289v
日期:2014.8.1
derivatives under mild conditions remains an important goal for medicinal and agricultural chemists. One representative example of a desirable transformation involves the conversion of aromatic and heteroaromaticketones and aldehydes into aryl and heteroaryl β,β,β-trifluoroethylarenes and -heteroarenes. The traditional approach for this net transformation involves stoichiometric metals and/or multistep reaction
Carboxyboronate as a Versatile In Situ CO Surrogate in Palladium‐Catalyzed Carbonylative Transformations
作者:Chieh‐Hung Tien、Alina Trofimova、Aleksandra Holownia、Branden S. Kwak、Reed T. Larson、Andrei K. Yudin
DOI:10.1002/anie.202010211
日期:2021.2.19
highlighted in the palladium‐catalyzed aminocarbonylation, alkoxycarbonylation, carbonylative Sonogashira coupling, and carbonylative Suzuki–Miyaura coupling of aryl halides. A variety of amides, esters, (hetero)aromatic ynones, and bis(hetero)arylketones were synthesized in good‐to‐excellent yields in a one‐pot fashion.
The present invention relates to a droplet microreactor, i.e. a microreactor consisting of a droplet of a specific liquid, the microreactor being wall-less, wherein the interface of the specific liquid with the ambient environment and with the support on which the droplet is deposited defines the limits of the microreactor. The microreactor is characterized in that it consists of a droplet comprising at least one ionic liquid. The present invention also relates to methods for carrying out chemical or biochemical reactions and/or mixes using said droplet microreactor, and also to a lab-on-chip comprising a microreactor according to the invention.
A dibenzylidenesorbitol derivative having at least one nuclear substituent selected from an ester group represented by --COOR.sup.1 and an amido group represented by --CONR.sup.2 R.sup.3, wherein R.sup.1 represents a hydrocarbon group having 1 to 20 carbon atoms, and R.sup.2 and R.sup.3 are identical or different and each independently represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group.
A New Class of Fluorescent Dye for Sensing Water in Organic Solvents by Photo-Induced Electron Transfer - A (Phenylamino)naphtho[1,2-<i>d</i>]oxazol-2-yl-Type Fluorophore with both Proton-Binding and Proton-Donating Sites
作者:Yousuke Ooyama、Haruka Egawa、Katsuhira Yoshida
DOI:10.1002/ejoc.200800606
日期:2008.11
A newclass of fluorescent dye for sensing water in organic solvents by photo-induced electron transfer (PET), based on a (phenylamino)naphtho[1,2-d]oxazol-2-yl-type fluorophore with both proton binding and proton donating sites, has been designed developed. The fluorophore exhibits a weak emission in organic solvents but a drastic enhancement in the fluorescence intensity is observed with increasing