Modular synthesis of bis- and tris-1,2,3-triazoles by permutable sequential azide–aryne and azide–alkyne cycloadditions

2014 ◽  
Vol 12 (38) ◽  
pp. 7489-7493 ◽  
Author(s):  
Suguru Yoshida ◽  
Takako Nonaka ◽  
Takamoto Morita ◽  
Takamitsu Hosoya
Keyword(s):  
New Method ◽  
Facile Synthesis ◽  
Modular Synthesis

A new method for aryne generation enabled facile synthesis of diverse bis- and tris-1,2,3-triazoles.

scholarly journals Facile synthesis of SnO2 shell followed by microwave treatment for high environmental stability of Ag nanoparticles

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38424-38436
Author(s):  
Anna Baranowska-Korczyc ◽  
Ewelina Mackiewicz ◽  
Katarzyna Ranoszek-Soliwoda ◽  
Jarosław Grobelny ◽  
Grzegorz Celichowski
Keyword(s):  
Microwave Irradiation ◽  
Ag Nanoparticles ◽  
Microwave Treatment ◽  
New Method ◽  
Environmental Stability ◽  
Facile Synthesis

This study describes a new method for passivating Ag nanoparticles (AgNPs) with SnO2 layer and their further treatment by microwave irradiation.

Synthesis of Pyrrolo[1,2-a][1,6]- and [1,8]naphthyridines by Alkyne-Carbonyl Metathesis

Synthesis ◽  
2020 ◽  
Author(s):  
Peter Ehlers ◽  
Peter Langer ◽  
Marian Blanco Ponce ◽  
Silvio Parpart ◽  
Alexander Villinger ◽  
...  
Keyword(s):  
Heterocyclic Compounds ◽  
Metathesis Reaction ◽  
Synthetic Methodology ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
One Pot ◽  
Metal Free ◽  
Modular Synthesis

AbstractA concise and modular synthesis of pyrrolo[1,2-a][1,6]- and [1,8]naphthyridines by a one-pot two-step reaction consisting of electrophilic acylation followed by an alkyne-carbonyl-metathesis reaction as the final cyclization step is reported. This developed synthetic methodology allows the facile synthesis of these heterocyclic core structures in mainly high overall yields under metal-free conditions. Reaction conditions are carefully optimized and display a novel supplement to access these tricyclic heterocyclic compounds.

Facile synthesis of yolk–shell structured Si–C nanocomposites as anodes for lithium-ion batteries

2014 ◽  
Vol 50 (44) ◽  
pp. 5878-5880 ◽  
Author(s):  
Lei Pan ◽  
Haibin Wang ◽  
Dacheng Gao ◽  
Shengyang Chen ◽  
Lei Tan ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
New Method ◽  
Facile Synthesis

A new method to synthesize yolk–shell structured Si–C nanocomposites as anodes for lithium-ion batteries was reported.

scholarly journals Synthetic routes to 1,3-divinyl cyclobutanes

1987 ◽  
Author(s):  
Σωτήριος Ιερόπουλος
Keyword(s):  
Metal Complexes ◽  
Good Yield ◽  
Room Temperature ◽  
Wittig Reaction ◽  
Organic Reactions ◽  
New Method ◽  
Cycloaddition Reactions ◽  
Facile Synthesis ◽  
Synthetic Routes ◽  
Ketone Ester

The chemistry of the cyclobutadiene metal complexes of the last decade is reviewed. Emphasis is given to the organic reactions involving the cyclobutadiene ligand. Dichoro, dimethyl, and diphenyl ketenes were used in [2+21-cycloaddition reactions with 1,3-dienes, which included 1-vinyl cyclohexene, 2-triethylsilylbuta-l,3-diene and 1- and 2- trimethylsilyloxybuta-1,3-dienes. Thecycloadditions were rarely found to be regiospecific and nearly always low yielding. The produced cyclobutanones were very often unstable. 2,2-Diphenyl-3-(1'-triethylsilyl-1'-ethenyl) cyclobutanone was prepared but it was found not to produce the expected 1,3-divinyl cyclobutan-l-ol when treated with vinylmagnesium bromide. 2,2-Dimethyl and 2,2-diphenyl-3-ethoxy cyclobutanones were prepared and their reactions with vinylmagnesium bromide and methyl lithium were investigated. Ethyl 4,4-diphenylbut-3-enoate was formed when 2,2-diphenyl-3-ethoxy cyclobutanone was treated with vinylmagnesium bromide. As well as the above ester, the same cyclobutanone gave 5,5-diphenylpent4-en-2-one when treated with methyl lithium. 2,2-Dimethyl3-ethoxy cyclobutanone gave the expected alcohols when reacted with the same two reagents. 1-(11-Phenyl-2'-propenyl)-2,2-dimethyl-3-vinyl cyclobutane was synthesised starting from a-pinene. The best route was found to involve the preparation of pinonic aldehyde by ozonolysis of q-pinene. The aldehyde was reduced to pinonic alcohol which was then converted to pinonic iodide by treatment with triphenylphosphine and iodine. The iodide was dehydrohalogenated by a new method, described in chapter six of the thesis, to givel-acetyl-2,2-dimethy1-3-vinyl cyclobutane. A subsequent Wittig reaction gave the desired divinyl cyclobutane. Finally, the development of a new methodology is described for the dehydrohalogenation of primary bromides and iodides. It involves a novel, facile synthesis of tetrakis(triphenylphosphine) nickel. The primary halide is mixed with 1,8-diazabicyclo[5.4.0lundec-7-ene and the mixture added to the low valent nickel reagent. The alkene was formed in good yield after twelve hours of stirring at room temperature under argon. The reaction was applied to a few halides and it was found to be compatible with alcohol, ketone, ester, and ether groups.

ChemInform Abstract: A New Method for the Facile Synthesis of Hydroxylated Flavones by Using Allyl Protection.

ChemInform ◽  
2014 ◽  
Vol 45 (36) ◽  
pp. no-no
Author(s):  
B. R. Nawghare ◽  
S. S. Sakate ◽  
P. D. Lokhande
Keyword(s):  
New Method ◽  
Facile Synthesis

Graphene oxide templating: facile synthesis of morphology engineered crumpled SnO2 nanofibers for superior chemiresistors

2018 ◽  
Vol 6 (28) ◽  
pp. 13825-13834 ◽  
Author(s):  
Dong-Ha Kim ◽  
Ji-Soo Jang ◽  
Won-Tae Koo ◽  
Il–Doo Kim
Keyword(s):  
Graphene Oxide ◽  
New Method ◽  
Two Dimensional ◽  
Facile Synthesis ◽  
Porous Oxide ◽  
Highly Porous

A new method of graphene oxide (GO) templating is pioneered to prepare highly porous oxide fibers consisting of crumpled two-dimensional (2D) SnO2 nanosheets (NSs).

Facile synthesis of core/shell ZnO/ZnS nanofibers by electrospinning and gas-phase sulfidation for biosensor applications

2015 ◽  
Vol 17 (37) ◽  
pp. 24029-24037 ◽  
Author(s):  
Anna Baranowska-Korczyc ◽  
Kamil Sobczak ◽  
Piotr Dłużewski ◽  
Anna Reszka ◽  
Bogdan J. Kowalski ◽  
...  
Keyword(s):  
Gas Phase ◽  
New Method ◽  
Core Shell ◽  
Facile Synthesis ◽  
Biosensor Applications

This study describes a new method of passivating ZnO nanofiber-based devices with a ZnS layer.

scholarly journals Synthesis of -Tosyloxylated gem-Difluoroalkanes via Oxidative Fluorination of Vinyl Sulfonates Featuring A [2,3]-Sulfonyloxy Migration

2021 ◽  
Author(s):  
Honggen Wang ◽  
Fang-Hai Tu ◽  
Zhan Li ◽  
Shuang Yang ◽  
Yin Li ◽  
...  
Keyword(s):  
Functional Group ◽  
High Efficiency ◽  
Facile Synthesis ◽  
Reaction Conditions ◽  
Sn2 Reactions ◽  
Modular Synthesis

The gem-difluoroalkanes widely exist in pharmaceuticals, agrochemicals and materials. Reported herein is a facile synthesis of tosyloxylated gem-difluoroalkanes via an oxidative fluorination of readily available vinyl sulfonates. An intriguing [2,3]-sulfonyloxy migration is involved as a key step. The OTs group in the product enables a divergent and modular synthesis of a wide variety of functionalized gem-difluoroalkanes via reliable SN2 reactions. Notable features of this protocol include mild reaction conditions, high efficiency and remarkably good functional-group tolerance.

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