An unexpected formation of the novel 7-oxa-2-azabicyclo[2.2.1]hept-5-ene skeleton during the reaction of furfurylamine with maleimides and their bioprospection using a zebrafish embryo model

2013 ◽  
Vol 11 (3) ◽  
pp. 407-411 ◽  
Author(s):  
Carlos E. Puerto Galvis ◽  
Vladimir V. Kouznetsov
Keyword(s):  
Green Synthesis ◽  
Intramolecular Cyclization ◽  
Zebrafish Embryo ◽  
The Novel ◽  
Unexpected Formation ◽  
Novel Strategy

An unexpected intramolecular cyclization during the reaction of furfurylamine with maleimides is reported as a novel strategy for the efficient green synthesis of the 7-oxa-2-azabicyclo[2.2.1]hept-5-ene skeleton.

scholarly journals Comment on “An unexpected formation of the novel 7-oxa-2-azabicyclo[2.2.1]hept-5-ene skeleton during the reaction of furfurylamine with maleimides and their bioprospection using a zebrafish embryo model” by C. E. Puerto Galvis and V. V. Kouznetsov, Org. Biomol. Chem., 2013, 11, 407

2017 ◽  
Vol 15 (30) ◽  
pp. 6447-6450 ◽  
Author(s):  
F. I. Zubkov ◽  
E. A. Kvyatkovskaya ◽  
E. V. Nikitina ◽  
P. N.-A. Amoyaw ◽  
V. V. Kouznetsov ◽  
...  
Keyword(s):  
Michael Addition ◽  
Zebrafish Embryo ◽  
The Novel ◽  
Unexpected Formation

It has been proved that the reaction between furfuryl amines and N-R-maleimides leads to the formation of aza-Michael addition products – 3-(furylmethylamino)-N-R-pyrrolidine-2,5-diones, instead of 7-oxa-2-azabicyclo[2.2.1]hept-5-enes, as this journal reported previously.

scholarly journals The Multifunctional Roles of Chitosan in the Formation of Flower-Shaped Palladium Nanoparticles

2021 ◽  
Vol 3 (1) ◽  
pp. 18
Author(s):  
Thi Tuong Vy Phan
Keyword(s):  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Human Health ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
The Novel ◽  
Natural Polymers ◽  
Green Method ◽  
Harmful Effects

The chemical and physical routes are usually used to synthesize metal nanoparticles. However, the harmful effects on the environment and human health has turned scientists into finding greener methods. We have developed the novel green method for the synthesis of flower Pd nanoparticles based on the chitosan (CS) polymer. In this method, CS can work as a stabilizer, a shape-directing agent, and a size-controllable agent for the synthesis of these nanoparticles. This study provides pioneer evidence about the multifunctional roles of natural polymers in the preparation of metal nanoparticles. Deep and extensive studies should be conducted to explore the great benefits of natural polymers in the green synthesis of metal nanoparticles.

scholarly journals Recent Advances in Enzymatic and Chemoenzymatic Cascade Processes

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1258
Author(s):  
Noelia Losada-Garcia ◽  
Zaida Cabrera ◽  
Paulina Urrutia ◽  
Carla Garcia-Sanz ◽  
Alicia Andreu ◽  
...  
Keyword(s):  
Organic Chemistry ◽  
Solid Phase ◽  
Cascade Reactions ◽  
Review Article ◽  
The Novel ◽  
Enzyme Cascade ◽  
Cascade Processes ◽  
Novel Strategy ◽  
Substantial Interest

Cascade reactions have been described as efficient and universal tools, and are of substantial interest in synthetic organic chemistry. This review article provides an overview of the novel and recent achievements in enzyme cascade processes catalyzed by multi-enzymatic or chemoenzymatic systems. The examples here selected collect the advances related to the application of the sequential use of enzymes in natural or genetically modified combination; second, the important combination of enzymes and metal complex systems, and finally we described the application of biocatalytic biohybrid systems on in situ catalytic solid-phase as a novel strategy. Examples of efficient and interesting enzymatic catalytic cascade processes in organic chemistry, in the production of important industrial products, such as the designing of novel biosensors or bio-chemocatalytic systems for medicinal chemistry application, are discussed

scholarly journals Towards the Green Synthesis of Furfuryl Alcohol in A One-Pot System from Xylose: A Review

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1101
Author(s):  
Gerardo Gómez Millán ◽  
Herbert Sixta
Keyword(s):  
Green Synthesis ◽  
Furfuryl Alcohol ◽  
The Novel ◽  
Economic Aspects ◽  
Complex Matrix ◽  
One Pot ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Production Concept ◽  
Biobased Economy

In the pursuit of establishing a sustainable biobased economy, valorization of lignocellulosic biomass is increasing its value as a feedstock. Nevertheless, to achieve the integrated biorefinery paradigm, the selective fractionation of its complex matrix to its single constituents must be complete. This review presents and examines the novel catalytic pathways to form furfuryl alcohol (FuOH) from xylose in a one-pot system. This production concept takes on chemical, thermochemical and biochemical transformations or a combination of them. Still, the bulk of the research is targeted to develop heterogeneous catalytic systems to synthesize FuOH from furfural and xylose. The present review includes an overview of the economic aspects to produce this platform chemical in an industrial manner. In the last section of this review, an outlook and summary of catalytic processes to produce FuOH are highlighted.

scholarly journals MSCs on an acellular dermal matrix (ADM) sourced from neonatal mouse skin regulate collagen reconstruction of granulation tissue during adult cutaneous wound healing

RSC Advances ◽  
2017 ◽  
Vol 7 (37) ◽  
pp. 22998-23010 ◽  
Author(s):  
Maosheng Chen ◽  
Ying Jin ◽  
Xue Han ◽  
Ning Wang ◽  
Xiaoyuan Deng ◽  
...  
Keyword(s):  
Wound Healing ◽  
Mouse Skin ◽  
Acellular Dermal Matrix ◽  
Neonatal Mouse ◽  
The Novel ◽  
Cutaneous Wound Healing ◽  
Dermal Matrix ◽  
Cutaneous Wound ◽  
Novel Strategy ◽  
Acellular Dermal

The novel strategy of MSCs seeded on ADM sourced from neonatal mouse skin promotes full-thickness cutaneous wound healing.

Unexpected formation of gold nanoflowers by a green synthesis method as agents for a safe and effective photothermal therapy

Nanoscale ◽  
2017 ◽  
Vol 9 (41) ◽  
pp. 15753-15759 ◽  
Author(s):  
Da-Peng Yang ◽  
Xuan Liu ◽  
Choon Peng Teng ◽  
Cally Owh ◽  
Khin Yin Win ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Photothermal Therapy ◽  
Fruit Juice ◽  
Therapeutic Potential ◽  
Synthesis Method ◽  
Gold Chloride ◽  
Unexpected Formation ◽  
Star Fruit ◽  
Gold Nanoflowers

A green synthesis of gold nanoflowers with photothermal therapeutic potential was achieved by using star fruit juice and gold chloride.

Unexpected Formation of 4-Hydroxy-6-nitroindoles in the Intramolecular Cyclization of O-(3-Amino-5-nitrophenyl)ketoximes.

ChemInform ◽  
2007 ◽  
Vol 38 (37) ◽  
Author(s):  
Sergei S. Vorob'ev ◽  
Mikhail D. Dutov ◽  
Irina A. Vatsadze ◽  
Vadim V. Kachala ◽  
Yuri A. Strelenko ◽  
...  
Keyword(s):  
Intramolecular Cyclization ◽  
Unexpected Formation

scholarly journals A Review of Sample and Hold Systems and Design of a New Fractional Algorithm

2020 ◽  
Vol 10 (20) ◽  
pp. 7360
Author(s):  
Manuel Duarte Ortigueira ◽  
José Tenreiro Machado
Keyword(s):  
Fractional Calculus ◽  
Multidimensional Scaling ◽  
Digital Systems ◽  
Superior Performance ◽  
The Novel ◽  
Analog To Digital ◽  
Exponential Order ◽  
First Order ◽  
Sample And Hold ◽  
Novel Strategy

Digital systems require sample and hold (S&H) systems to perform the conversion from analog to digital and vice versa. Besides the standard zero and first order holds, we find in the literature other versions, namely the fractional and exponential order holds, involving parameters that can be tuned to produce a superior performance. This paper reviews the fundamental concepts associated with the S&H and proposes a new fractional version. The systems are modeled both in the time and Laplace domains. The new S&H stemming from fractional calculus generalizes these devices. The different S&H systems are compared in the frequency domain and their relationships visualized by means of hierarchical clustering and multidimensional scaling representations. The novel strategy allows a better understanding of the possibilities and limitations of S&H systems.

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