scholarly journals Zn–Catalyzed Direct Synthesis of 3-Iodo-1,3-dienes from α-Allenols

2020 ◽  
Vol 3 (1) ◽  
pp. 113
Author(s):  
Mireia Toledano-Pinedo ◽  
Beatriz Peñín ◽  
Teresa Martínez del Campo ◽  
Pedro Almendros
Keyword(s):  
Direct Synthesis ◽  
Environmentally Friendly ◽  
Synthetic Route

We wish to report herein a new protocol that allows one to obtain 3-iodo-1,3-dienes through a sustainable process starting from α-allenols. In this new synthetic route, zinc (II) derivatives are used as metallic promoter, which are an inexpensive and environmentally friendly species.

scholarly journals Recent Advances in Rapid Synthesis of Non-proteinogenic Amino Acids from Proteinogenic Amino Acids Derivatives via Direct Photo-Mediated C–H Functionalization

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5270
Author(s):  
Zhenbo Yuan ◽  
Xuanzhong Liu ◽  
Changmei Liu ◽  
Yan Zhang ◽  
Yijian Rao
Keyword(s):  
Amino Acids ◽  
Direct Synthesis ◽  
Environmentally Friendly ◽  
Powerful Method ◽  
Rapid Synthesis ◽  
Conservation Of Energy ◽  
Mild Conditions ◽  
Recent Advances ◽  
Recent Developments

Non-proteinogenic amino acids have attracted tremendous interest for their essential applications in the realm of biology and chemistry. Recently, rising C–H functionalization has been considered an alternative powerful method for the direct synthesis of non-proteinogenic amino acids. Meanwhile, photochemistry has become popular for its predominant advantages of mild conditions and conservation of energy. Therefore, C–H functionalization and photochemistry have been merged to synthesize diverse non-proteinogenic amino acids in a mild and environmentally friendly way. In this review, the recent developments in the photo-mediated C–H functionalization of proteinogenic amino acids derivatives for the rapid synthesis of versatile non-proteinogenic amino acids are presented. Moreover, postulated mechanisms are also described wherever needed.

A succinct access to ω-hydroxylated jasmonates via olefin metathesis

2017 ◽  
Vol 72 (7-8) ◽  
pp. 285-292 ◽  
Author(s):  
Guillermo H. Jimenez-Aleman ◽  
Selina Seçinti ◽  
Wilhelm Boland
Keyword(s):  
Abiotic Stress ◽  
Olefin Metathesis ◽  
Higher Plants ◽  
Environmentally Friendly ◽  
Signaling Molecules ◽  
Synthetic Route ◽  
Limited Availability ◽  
Cross Metathesis ◽  
Physiological Processes

AbstractIn higher plants, jasmonates are lipid-derived signaling molecules that control many physiological processes, including responses to abiotic stress, defenses against insects and pathogens, and development. Among jasmonates, ω-oxidized compounds form an important subfamily. The biological roles of these ω-modified derivatives are not fully understood, largely due to their limited availability. Herein, a brief (two-step), simple and efficient (>80% yield), versatile, gram-scalable, and environmentally friendly synthetic route to ω-oxidized jasmonates is described. The approach utilizes olefin cross-metathesis as the key step employing inexpensive, commercially available substrates and catalysts.

scholarly journals Environmentally friendly and facile synthesis of Rh nanoparticles at room temperature by alkaline ethanol solution and their application for ethanol electrooxidation

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3161-3169 ◽  
Author(s):  
Fuhai Li ◽  
Hanqin Weng ◽  
Yun Shang ◽  
Zuoming Ding ◽  
Zheng Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Environmentally Friendly ◽  
Ethanol Solution ◽  
Ethanol Electrooxidation ◽  
Synthetic Route ◽  
Facile Synthesis

A facile, fact and green synthetic route was developed to prepare Rh nanoparticles at room temperature.

Synthesis of surfactant-free SnS nanoplates in an aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 94796-94801 ◽  
Author(s):  
Heeseung Yang ◽  
Chang-Eun Kim ◽  
Anupam Giri ◽  
Aloysius Soon ◽  
Unyong Jeong
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Chemical Transformation ◽  
Environmentally Friendly ◽  
Synthetic Route ◽  
Aqueous Conditions

A synthetic route to produce surfactant-free SnS nanoplates with the Pbnm crystal structure is suggested. The process is quick and environmentally-friendly, accomplished under mild aqueous conditions by chemical transformation.

Thermosetting polyurethanes prepared with the aid of a fully bio-based emulsifier with high bio-content, high solid content, and superior mechanical properties

2019 ◽  
Vol 21 (3) ◽  
pp. 526-537 ◽  
Author(s):  
Lingxiao Liu ◽  
Jingyi Lu ◽  
Yi Zhang ◽  
Haiyan Liang ◽  
Dunsheng Liang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Environmentally Friendly ◽  
Solid Content ◽  
Synthetic Route ◽  
High Solid Content ◽  
High Solid ◽  
Waterborne Polyurethanes ◽  
Superior Mechanical Properties

The green synthetic route developed in this study offers a new platform for environmentally friendly emulsifiers for waterborne polyurethanes.

scholarly journals Green synthesis of 1,5-dideoxy-1,5-imino-ribitol and 1,5-dideoxy-1,5-imino-dl-arabinitol from natural d-sugars over Au/Al2O3 and SO42−/Al2O3 catalysts

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hongjian Gao ◽  
Ao Fan
Keyword(s):  
Green Synthesis ◽  
Heterogeneous Catalysts ◽  
Environmentally Friendly ◽  
Synthetic Route

AbstractA green synthetic route for the synthesis of some potential enzyme active hydroxypiperidine iminosugars including 1,5-dideoxy-1,5-imino-ribitol and 1,5-dideoxy-1,5-imino-dl-arabinitol, starting from commercially available d-ribose and d-lyxose was tested out. Heterogeneous catalysts including Au/Al2O3, SO42−/Al2O3 as well as environmentally friendly reagents were employed into several critical reaction of the route. The synthetic route resulted in good overall yields of 1,5-dideoxy-1,5-imino-ribitol of 54%, 1,5-dideoxy-1,5-imino-d-arabinitol of 48% and 1,5-dideoxy-1,5-imino-l-arabinitol of 46%. The Au/Al2O3 catalyst can be easily recovered from the reaction mixture and reused with no loss of activity.

Schiff-base polymer derived nitrogen-rich microporous carbon spheres synthesized by molten-salt route for high-performance supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 60956-60961 ◽  
Author(s):  
Shanjin Su ◽  
Qingxue Lai ◽  
Yanyu Liang
Keyword(s):  
Schiff Base ◽  
Molten Salt ◽  
Industrial Application ◽  
High Performance ◽  
Environmentally Friendly ◽  
Microporous Carbon ◽  
Synthetic Route ◽  
Carbon Spheres ◽  
Base Polymer

A molten-salt route and Schiff-base chemistry are combined to prepare high-capacitive nitrogen-rich microporous carbon spheres. The simple and environmentally friendly synthetic route holds great potential for industrial application.

scholarly journals Direct Synthesis of Polyaromatic Cyclophanes Containing Bis-Methylene-Interrupted Z-Double Bonds and Study of Their Antitumor Activity In Vitro

2021 ◽  
Vol 22 (16) ◽  
pp. 8787
Author(s):  
Vladimir A. D’yakonov ◽  
Ilgiz I. Islamov ◽  
Lilya U. Dzhemileva ◽  
Elina Kh. Makarova ◽  
Usein M. Dzhemilev
Keyword(s):  
Cell Cycle ◽  
Direct Synthesis ◽  
Dicarboxylic Acids ◽  
Subsequent Treatment ◽  
Synthetic Route ◽  
Ethylcarbodiimide Hydrochloride ◽  
Aromatic Dicarboxylic Acids ◽  
High Cytotoxic Activity ◽  
Hydrolysis Of

An original synthetic route was developed for the preparation of previously unknown unsaturated polyaromatic macrolactones containing a 1Z,5Z-diene moiety in 48–71% yields and with >98% stereoselectivity. The method is based on intermolecular cyclocondensation of aromatic dicarboxylic acids with α,ω-alka-nZ,(n+4)Z-dienediols (1,12-dodeca-4Z,8Z-dienediol, 1,14-tetradeca-5Z,9Z-dienediol, 1,18-octadeca-7Z,11Z-dienediol) mediated by N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC)/4-dimethylaminopyridine (DMAP). The unsaturated diols were prepared by successive homo-cyclomagnesiation of tetrahydropyran ethers of O-containing 1,2-dienes with EtMgBr in the presence of Mg metal and the Cp2TiCl2 catalyst (10 mol.%) and subsequent treatment with 0.1 equiv. of para-toluenesulfonic acid of pyran ethers formed after the acid hydrolysis of magnesacyclopentanes. The resulting cyclophanes exhibited high cytotoxic activity in vitro against Jurkat, K562, U937, and HL60 cancer lines. Additionally, the synthesized products were studied for their effect on mitochondria, ability to induce apoptosis, and influence on the cell cycle using modern flow cytometry methods.

Sign in / Sign up

Export Citation Format

Share Document