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Synthesis and Luminescence Properties of Colloidal YVO4:Eu Phosphors


05 Feb 2017

Synthesis useful for a laboratory course.

Solid state phosphors in the form of nanosized particles attract a lot of attention. This interest is of both fundamental and practical character. Ultrafine and homogeneous fluorescence particles can be used as biological labels and in the various lightning...

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Synthesis of Thiazolinone, Aminopyrazole, Pyrazolopyrimidine, and Pyrazolotriazine Derivatives Starting from 1-Naphthyl-2-Cyanoacetamide


31 Jan 2017

Good yields, but greener solvents recommended

Summary:

This paper reports 1-Naphthyl-2-cyanoacetamide used as a precursor for the synthesis of different novel heterocyclic moieties such as 5-Aminopyrazole, thiazolinone, pyrazolo[1,5-a]pyrimidine, 4H-pyrazolo[3,4-d]pyrimidin-4-one and pyrazolo[3,4-d...

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Thermochemistry of halogen-containing organic compounds with influence on atmospheric chemistry


31 Jan 2017

Good study - need to find methods for iodinated-molecules

Summary:

This research article reports a study on the thermocehemical behaviour of halogen-containing molecules in atmospheric chemical processes. The thermodynamic and thermochemical model of these components helps in understanding the interactions in...

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Synthesis and in Vitro Anti-Tumor Activity of A New Class of Acyclic Thioglycosides


31 Jan 2017

Innovative approach - Lower yields

Summary:

This paper reports the synthesis of a new class of acrylamide thioglycoside derivatives utilizing a one-pot synthesis. Further heating of the resultant glycosides with hydrazine is reported to give pyrazole derivatives. Among those synthesized,...

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Preparation and characterization of uniform, spherical particles of Y2O2S and Y2O2S:Eu


29 Jan 2017

Neat but a bit complicated synthesis

Yttrium oxysulfide – Y2O2S is knows an excellent host material for the Eu(III) activated red emission phosphor, which has been used for decades in the CRT displays and conventional TV due to its excellent brightness, color purity, life time and compatibility...

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Synthesis and Azidolysis of 2-Chlorotetramethylguanidine. Synthetic Utility of Hexa- and Tetramethylguanidinium Azide


14 Jan 2017

Good synthesis but experimental lacking some useful details

 

The preparation of tetramethylguanidium azide was successfully carried out following the literature preparation (JOC 31, 1426 (1966)).  Hydrazoic acid was prepared as a Et2O solution by adding conc HCl over 30 minutes to a ice cold solution of NaN3 in...

(1)

A fast and oxygen-promoted protocol for the ligand-free Suzuki reaction of 2-halogenated pyridines in aqueous media


08 Jan 2017

Best method to make various 2-phenylpyridine derivatives

Review :-

1) Synthesized all compounds from Table 1 (1-8) and Table 2 (1-13). I was able to achieve higher yields than the ones reported in this paper by doubling the catalyst concentration.

2) I used excess i.e 3 mol % Palladium acetate than the...

(2)

1-Naphthyl-2-cyanoacetamide in heterocyclic synthesis: synthesis and evaluation of the antimicrobial activity of some new pyridine, pyrimidine, and naphtho[2,1-b]oxazine derivatives


01 Jan 2017

Very well reproducible but greener solvents need to be used

Summary:

This paper reports the reactivity of the methylene group of 1-naphthyl-2-cyanoacetamide 1 which was tested towards different reagents. These new compounds have been reported to be characterized by elemental analysis, IR, 1HNMR, 13C NMR, and mass...

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Hydrodeoxygenation of acetic acid in a microreactor


01 Jan 2017

Feasible and efficient process. Easily reproducible.

Summary:

This study reports the hydrodeoxygenation (HDO) of acetic acid. The authors have chosen a packed bed microreactor for the purpose. The reason for put forward by the authors for choosing micro reactor is its efficiency in operation under reduced...

(2)

“On water” organic synthesis: a highly efficient and clean synthesis of 2-aryl/heteroaryl/styryl benzothiazoles and 2-alkyl/aryl alkyl benzothiazolines


01 Jan 2017

Excellent practical method. Highly recommended.

Summary:

A convenient, clean and environmentally benign method for ‘‘on water’’ synthesis of benzothiazoles/benzothiazolines has been described. Although previous methods are available in literature for synthesis of such compounds, the ease of operation,...

(0)

Selective quenching of benzimidazole derivatives by Cu2+ metal ion


01 Jan 2017

Many details omitted which makes it clumsy to repeat

Summary:

This paper reports the binding effect of some novel benzimidazole derivatives with Cu2+ metal ion by solution spectral studies. Benzimidazole complexes (16) were studied for fluorescence quenching by Cu2+ in comparison to Fe3+, Mg2+, Ag+, K+...

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Synthesis, structure and study of azo-hydrazone tautomeric equilibrium of 1,3-dimethyl-5-(arylazo)-6-amino-uracil derivatives


24 Dec 2016

Lives up to the claims by the authors

Summary:

This paper reports the synthesis of hexamethylenebisacetamide (HMBA) without organic solvent or gas protection via amide exchange reaction of hexamethylenediamine (HDA) with CH3CN and H2O catalysed by CuO. The authors report the method to be more...

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Oxorhenium-catalyzed deoxydehydration of glycols and epoxides


24 Dec 2016

Average reactions. Toxic solvents.

Summary:

Deoxydehydration of glycols and epoxides catalysed by oxorhenium complexes is described in this paper. Methyl trioxorhenium (MTO) was the choice as the catalyst for the reactions. The use of other catalytic conditions for such reactions are...

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Nano ceria catalyzed synthesis of substituted benzimidazole, benzothiazole, and benzoxazole in aqueous media


24 Dec 2016

Work is good, descriptions could be better

Summary:

This paper reports a methodology for synthesis of substituted benzimidazole, benzothiazole, and benzoxazole in aqueous media. The method is novel in its approach of utilizing water as the medium, making it fit for a green chemistry protocol. The...

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A mild and efficient amide formation reaction mediated by P(OEt)3and iodine


24 Dec 2016

Reproducible reactions. Can be extended to other analouges

Summary:

This paper describes a novel method for efficient synthesis of amides through reaction of carboxylic acids with amines by activation with P(OEt)3 and Iodine. The novelty lies in easy amidation of several primary and secondary amines to synthesize...

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Markovnikov Alkyne Hydrosilylation Catalyzed by Ruthenium Complexes


24 Dec 2016

trans-hydrosilylation internal alkynes: notes/modifications

Summary:

Trost and Ball discovered the efficient Ru-catalyst for Markovnikov hydrosilylation of terminal alkynes as well as trans-hydrosilylation of internal alkynes. This reaction is the only general method for accessing geminal alkenylsilanes via ...

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Method and basis set analysis of oxorhenium(V) complexes for theoretical calculations


24 Dec 2016

Well established computational procedure

Summary:

This paper describes the analysis of methods and basis sets for theoretical calculations on oxorhenium(V) complexes. A variety of ligand systems with different coordinating atoms (N, O, P, S, Cl, and Se) were incorporated into this study. Two...

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Efficient Route for Cyclic Olefin Polymerization:  Nonchelated Monodentate Benzimidazole Nickel(II) Complex Catalysts for Vinyl Polymerization of Norbornene


24 Dec 2016

Innovative approach but low yields

Summary:

This article describes a method for cyclic olefin polymerization employing a non-chelated monodentate benzimidazole Ni(II) complex. The specific reaction catalysed, is the vinyl polymerization of norbornene. The article also describes the methods...

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Sulfonated Schiff base dinuclear and polymeric copper( ii ) complexes: crystal structures, magnetic properties and catalytic application in Henry reaction


24 Dec 2016

More aldehydes need to be tested for reproducibility

Summary:

This paper describes the synthesis of dinuclear and polymeric copper complexes of a sulfonated Schiff base ligand, 2-(2-pyridylmethyleneamino)benzenesulfonic acid. Also described, are the crystal structures, magnetic properties and catalytic...

(1)

Theoretical study of borazine and substituted borazines using density functional theory method


23 Dec 2016

Good theory. Experimental data can add value.

Summary:

This paper describes the theoretical study on borazine and substituted borazines by the means of density functional theory. Amino group was used as the common donor group while four acceptor groups namely –NO2, –C≡N, –COCl and –NMe2 were chosen...

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