A highly efficient multienzyme system for the one-step synthesis of a sialyl trisaccharide: in situ generation of sialic acid and N-acetyllactosamine coupled with regeneration of UDP-glucose, UDP-galactose and CMP-sialic acid

1991 ◽  
Vol 113 (16) ◽  
pp. 6300-6302 ◽  
Author(s):  
Yoshitaka Ichikawa ◽  
Jennifer Lin Chun Liu ◽  
Gwo Jenn Shen ◽  
Chi Huey Wong
Keyword(s):  
Sialic Acid ◽  
Highly Efficient ◽  
Multienzyme System ◽  
One Step ◽  
In Situ Generation ◽  
The One

scholarly journals Towards coupling direct activation of methane with in situ generation of H2O2

2019 ◽  
Vol 9 (18) ◽  
pp. 5142-5149
Author(s):  
Amin Delparish ◽  
Shamayita Kanungo ◽  
John van der Schaaf ◽  
M. Fernanda Neira d'Angelo
Keyword(s):  
Direct Activation ◽  
Oxidation Of Methane ◽  
One Step ◽  
In Situ Generation ◽  
The One ◽  
Shed Light

This study aims to shed light on the one-step oxidation of methane to methanol with in situ generated H2O2 by means of a wall-coated catalytic microreactor.

scholarly journals Analysis of the Influence of Fibers on the Formability of Metal Blanks in Manufacturing Processes for Fiber Metal Laminates

2019 ◽  
Vol 3 (1) ◽  
pp. 2 ◽  
Author(s):  
Thomas Mennecart ◽  
Soeren Gies ◽  
Noomane Ben Khalifa ◽  
A. Erman Tekkaya
Keyword(s):  
Contact Forces ◽  
Starting Time ◽  
Fiber Metal Laminate ◽  
Metal Sheets ◽  
Different Types ◽  
One Step ◽  
Fiber Metal ◽  
The One ◽  
Metal Blank

In the one-step manufacturing process for fiber metal laminate parts, the so-called in situ hybridization process, the fabrics are interacting with metal blanks. During deep drawing, the liquid matrix is injected between the metal sheets through the woven fiber layers. The metal blanks can be in contact with dry or with infiltrated fibers. The formability of the blanks is influenced by the variation of the starting time of injection. The reason for that is that, due to high contact forces, the fibers are able to deform the metal surface locally, so that movement and the strain of the blanks is inhibited. To investigate the influence of different fibers on the formability of metals, Nakazima tests are performed. In these tests, two metal blanks are formed with an interlayer of fibers. The results are compared with the formability of two blanks without any interlayer. It is shown that in with fibers between sheets, the formability decreases compared to the formability of two metal blanks without interlayers. Based on a simplified numerical model for different types of fibers, the interactions of the fibers with the metal blank are analyzed. It could be shown that the friction due to contact has more influence than the friction due to the form fit caused by the imprints.

scholarly journals One-Step Synthesis of 2-Alkenecarbodithioate Esters from Substituted Propargyl Ethers, and Their Conversion into Isothiazole Ring through a [4+1] Type Oxidative Ring Closure

2017 ◽  
Vol 12 (6) ◽  
pp. 1934578X1701200
Author(s):  
Kazuaki Shimada ◽  
Fumiya Ishikawa ◽  
Md. Ashraful Alam ◽  
Toshinobu Korenaga
Keyword(s):  
Elemental Sulfur ◽  
Ring Closure ◽  
One Step ◽  
Chloramine T ◽  
In Situ Generation

Treatment of substituted propargyl methyl ethers with a base and elemental sulfur in the presence of a thiolate ion afforded 2-alkenecarbodithioate esters in good yields. The reaction is assumed to proceed through a pathway involving in situ generation of propadienethione intermediates. Further conversion of 2-alkenecarbodithioate esters into 2,3-dihydroisothiazoles were efficiently performed by treating with chloramine-T through a [4+1] type oxidative ring closure via thiocarbonyl S-tosylimides.

In-situ regeneration mechanisms of hybrid catalysts in the one-step synthesis of dimethyl ether from syngas

2007 ◽  
Vol 115 (1-2) ◽  
pp. 23-26 ◽  
Author(s):  
Youshun Luan ◽  
Hengyong Xu ◽  
Chunying Yu ◽  
Wenzhao Li ◽  
Shoufu Hou
Keyword(s):  
Dimethyl Ether ◽  
Hybrid Catalysts ◽  
In Situ Regeneration ◽  
One Step ◽  
The One ◽  
Synthesis Of Dimethyl Ether

scholarly journals 1-(4-Nitrophenyl)-1H-1,2,3-Triazole-4-carbaldehyde: Scalable Synthesis and Its Use in the Preparation of 1-Alkyl-4-Formyl-1,2,3-triazoles

Organics ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 404-414
Author(s):  
Tomas Opsomer ◽  
Kaat Valkeneers ◽  
Ana Ratković ◽  
Wim Dehaen
Keyword(s):  
One Pot ◽  
Complete Hydrolysis ◽  
One Step ◽  
Synthetic Intermediates ◽  
Cornforth Rearrangement ◽  
Scalable Synthesis ◽  
The One ◽  
Novel Applications ◽  
Hydrolysis Of

1,2,3-Triazole-4-carbaldehydes are useful synthetic intermediates which may play an important role in the discovery of novel applications of the 1,2,3-triazole moiety. In this work, a one-step multigram scale synthesis of 4-formyl-1-(4-nitrophenyl)-1H-1,2,3-triazole (FNPT) as a preferred reagent for the synthesis of 1-alkyl-4-formyltriazoles is described, making use of the commercially available 3-dimethylaminoacrolein and 4-nitrophenyl azide. Next, the earlier reported reaction of FNPT with alkylamines is further explored, and for hexylamine, the one-pot sequential cycloaddition and Cornforth rearrangement is demonstrated. In addition, a useful protocol for the in situ diazotization of 4-nitroaniline is provided. This facilitated the complete hydrolysis of rearranged 4-iminomethyl-1,2,3-triazoles and allowed for the recycling of 4-nitrophenyl azide.

In situ generation of supported palladium nanoparticles from a Pd/Sn/S chalcogel and applications in 4-nitrophenol reduction and Suzuki coupling

2019 ◽  
Vol 7 (9) ◽  
pp. 4446-4450 ◽  
Author(s):  
Xinyao Shan ◽  
Ning Sui ◽  
Wengang Liu ◽  
Manhong Liu ◽  
Jian Liu
Keyword(s):  
Palladium Nanoparticles ◽  
Suzuki Coupling ◽  
Pd Nanoparticles ◽  
Nitrophenol Reduction ◽  
One Step ◽  
Supported Palladium ◽  
In Situ Generation ◽  
Catalytic Applications

A one-step in situ route to obtain well-defined and size-controllable Pd nanoparticles was reported and employed for catalytic applications.

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