Biocatalytic Friedel-Crafts Alkylation Using Non-natural Cofactors
作者:Harald Stecher、Martin Tengg、Bernhard J. Ueberbacher、Peter Remler、Helmut Schwab、Herfried Griengl、Mandana Gruber-Khadjawi
DOI:10.1002/anie.200905095
日期:2009.12.7
A novel biocatalytic protocol for CC bond formation is described and is an equivalent to Friedel–Craftsalkylation. S‐Adenosyl‐L‐methionine (SAM), the major methyl donor for biological methylation catalyzed by methyltransferases (Mtases), can perform alkylations (see scheme). These enzymes can accept non‐natural cofactors and transfer functionalities other than methyl onto aromatic substrates.
[EN] SENSOR DYES FOR REAL-TIME SENSING OF METAL IONS IN AQUEOUS ENVIRONMENTS<br/>[FR] COLORANTS DE DÉTECTION POUR LA DÉTECTION EN TEMPS RÉEL D'IONS MÉTALLIQUES DANS DES ENVIRONNEMENTS AQUEUX
申请人:UWM RES FOUND INC
公开号:WO2017066672A1
公开(公告)日:2017-04-20
Provided herein are dyes for detecting and distinguishing metals in a sample, as well as compositions and methods comprising the same.
本文提供了用于检测和区分样品中金属的染料,以及包含相同染料的组合物和方法。
A Tandem Enzymatic sp<sup>2</sup>
-C-Methylation Process: Coupling in Situ S-Adenosyl-<scp>l</scp>
-Methionine Formation with Methyl Transfer
作者:Joanna C. Sadler、Luke D. Humphreys、Radka Snajdrova、Glenn A. Burley
DOI:10.1002/cbic.201700115
日期:2017.6.1
A one‐pot, two‐enzyme C‐methylation process is described. Combining SAM production using SalL (Salinospora tropica) with the C‐methyltransferase NovO (Streptomyces spheroides) enables the synthesis of a suite of methylated and ethylated coumarin products, as demonstrated for labelled 13CH3, 13CD3 and CD3 groups from their corresponding SAM analogues.
描述了一种单锅,两种酶的C-甲基化过程。组合使用SALL(SAM生产Salinospora tropica)与C-甲基NOVO(链霉菌spheroides)使一套甲基化和乙基香豆素产物的合成,这表现为标记13 CH 3,13 CD 3及CD 3组从它们相应的SAM类似物。
The effect of a thiophene ring in the outer position on mesomorphic properties of the bent-shaped liquid crystals
Novel bent-shaped compounds with the naphthalene central core possessing an outer thiophene unit in the lengthening arm were synthesized. Mesomorphic behaviour of new materials was studied using optical polarising microscopy, DSC, and electrooptic methods. The structures of mesophases were identified by X-ray diffraction and the structural parameters established. In the case of the thiophene unit in one molecular arm (the phenyl in the opposite arm) we succeeded in obtaining mesogenic properties for all types of lateral substitutions on the central naphthalene core. All non-substituted compounds and materials with the central core substituted by CH3 or Cl exhibited the B2 phase. The B7 phase has been observed for all compounds with CN-substituted central core. Materials with the thiophene unit in both lengthening arms were not liquid crystalline except for the CN-substituted compound exhibiting the B7 phase. Mesomorphic properties of compounds with the thiophene are compared with those detected on analogous materials with the phenyl ring.
COMPOSITION FOR FORMING ORGANIC FILM, SUBSTRATE FOR MANUFACTURING SEMICONDUCTOR DEVICE, METHOD FOR FORMING ORGANIC FILM, AND PATTERNING PROCESS
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP3508918A1
公开(公告)日:2019-07-10
The invention provides: a composition for forming an organic film, the composition having high filterability and enabling formation of an organic film which has high pattern-curving resistance, and which prevents a high-aspect line pattern particularly finer than 40 nm from line collapse and twisting after dry etching; a method for forming an organic film and a patterning process which use the composition; and a substrate for manufacturing a semiconductor device, including the organic film formed on the substrate. The composition for forming an organic film includes a condensate (A), which is a condensation product of dihydroxynaphthalene shown by the following formula (1) and a condensation agent, or a derivative of the condensate (A). A sulfur content among constituent elements contained in the condensate (A) or the derivative of the condensate (A) is 100 ppm or less in terms of mass.