ISSN (Print): 2213-3461
ISSN (Online): 2213-347X
Volume 7, 3 Issues, 2020
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ISSN (Print): 2213-3461
ISSN (Online): 2213-347X
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ORGANOCHALCOGENS IN GREEN CHEMISTRY
Current Green Chemistry, Volume 3, Number 1
Guest Editor(s): Claudio Santi, Luca Sancineto
I am completely satisfied with the service I received from Bentham Science Publishers, right from the submission of our research paper in ‘Current Green Chemistry’ to its publication in the journal. The reviewers' and editor's comments were very helpful in improving the paper.
I take this opportunity to express my appreciation to the whole team of BSP!
Prof. R. K. Bansal
(Department of Chemistry, IIS University, Jaipur, India)
9 Articles Ahead of Print are available electronically
The first part of the special Current Green Chemistry issue which you are keeping just in your hands contains 3 papers
whose content is related to the title of the issue. The first manuscript co-authored by Prof. Michaela Gulea and Dr. Morgan
Donnard presents progress in the synthesis of organic thiocyanates (OTC) over the past five years (from the end of 2015 to
mid-2019). It is an update to the tutorial review published in the Chemical Society Reviews in 2016. Both reviews show that
this topic, despite that the thiocyanate functional group has been known for decades, is still developing dynamically. This results
in regular and often appearing new synthetic methodologies. The authors attempt to show sustainable aspects of the
presented synthetic protocols related with thiocyanation or sulfur-cyanation. On 39 schemes present in the content, you will
find very well balanced information regarding new synthetic protocols devoted to the reactions involving thiocyanation and reactions
involving S-cyanation. The first part is subsequently divided into two subsections, which describe reactions with
preservation of the SCN group and the procedures in which transformations of the SCN group take place. The second part devoted
to reactions based on S cyanation presents three protocols used to convert disulphide or thiol into the corresponding SCN
The second paper co-authored by Prof. Lenardao and his colleagues presents Deep Eutectic Solvents (DES) as an alternative
medium for the preparation of organosulfur compounds. This manuscript constitutes the first, comprehensive collection of synthetic
procedures in which DES serve as a “green alternative” for the Volatile Organic Compounds (VOCs) and traditional ionic
liquids (ILs), more or less commonly used as the reaction medium. A brief presentation of the twenty years old story of this
solvent and its basic physicochemical properties which allow their use as a new reaction medium open this manuscript. This
introduction is followed by sequential discussions on the use of DES as a reaction medium in procedures leading to a rich family
of organosulfur derivatives based on the six general reactions (condensation, cyclization, ring-opening, C-S bond formation,
one-pot reactions, C-H bond activation). For a few procedures mechanistic proposals complement experimental details.
The third manuscript, co-authored by Prof. Uchiyama and his students, is an original article describing their successful attempts
to develop procedures leading to a fluorescence fluoride ion sensor. The ability to detect fluoride ion based on this procedure
is due to the colour change of N,N-bis(trimethylsilyl)-9-aminoanthracene, which under ultraviolet showed blue fluorescence
originated from the anthracene skeleton due to orthogonal relation between anthracene skeleton and
bis(trimethylsilyl)amino group, and 9-aminoanthracne, which shows green fluorescence due to conjugation that exists between
the anthracene and the amino group.
The ever increasing chemical pollution associated with organic transformations is an alarming issue. To get rid of the hazardous
chemical substances, numerous efforts have been made to modify chemical processes and make them environmentally
sustainable. It has been well established that the adaptation of green credentials is the only way to attain this goal. As a result,
the last decade has shown a tremendous outburst to adopt green techniques in organic transformations. This thematic issue intends
to highlight some of the recent developments in this direction. After successful completion of the first part i.e. Part 1(A)
with five important review articles [1-5], this part i.e. ‘Organic transformations by following green credentials- Part 1 (B)’
highlights some of the significant contributions towards the development of various organic transformations with special emphasis
on greener aspects. The present issue consists of four review articles and two original research articles contributed by the
renowned scientists working in this field.
Nowadays, task specific ionic liquids have gained significant attention due to their environment-friendliness. These are being
used as efficient catalysts as well as reaction media for various organic transformations.
Metathesis reactions between carbonyls and olefins or alkynes are becoming the most popular tools for carbon-carbon bondforming
reactions. In the first contribution, Das et al.,  describe various strategies of carbonyl-alkyne and carbonyl-olefin
metathesis reactions for the synthesis of complex molecules, natural products and pharmaceuticals with high atom-economy
under environmentally benign reaction conditions.
In the second contribution, Biswas et al.,  demonstrate the catalytic applicability of the polymeric ion-exchange resin and
polypeptide organic polymers as recoverable solid catalysts and the role of some organic polymers assisting catalyst recovery
by accelerating the actual process of catalyst separation.
In the third contribution, Saha et al.,  summarize various catalytic applications of crystalline nano-ZnO towards the synthesis
of diverse biologically promising heterocycles in aqueous media.
The fourth contribution of this thematic issue by Padvi et al.,  provides an up to date literature related to the preparation,
characterization, physical properties and various applications of task-specific ionic liquids as catalysts or solvents in organic
In the fifth contribution, Kumar et al.,  and his group describe the synthesis of conformationally locked four different 3'-
azido-C-4'-spirooxetano-xylonucleosides i.e., 3'-azido-3′-deoxy-C-4'-spirooxetano-xylothymidine, 3'-azido-3′-deoxy-C-4'-
spirooxetano-xylouridine, 3'-azido-3′-deoxy-C-4'-spirooxetano-xylocytidine and 3'-azido-3′-deoxy-C-4'-spirooxetano-xylo adenosine
with excellent yields via chemo-enzymatic convergent route.
The last contribution, Singh et al.,  describes a simple, straightforward and eco-friendly protocol developed by our research
group for the efficient synthesis of pharmaceutically promising various indole derivatives viz, 3,3-bis(indol-3-yl)indolin-
2-ones, bis(indol-3-yl)(aryl)methanes and tris(indol-3-yl)methanes using a catalytic amount of mandelic acid as an efficient,
naturally occurring, organo-catalyst in aqueous ethanol at room temperature.
I am feeling honored and really grateful to all the contributors for their efforts to design this special thematic issue for
Current Green Chemistry (CGC). I am very much thankful to the senior journal manager and the entire editorial team of
Current Green Chemistry, especially Ms. Humaira Bilal, for her continuous support. No words are sufficient to express my
gratitude to Prof. (Dr.) György Keglevich (Editor-in-Chief) for his unconditional help and encouragement in each step. I am
also thankful to the respective reviewers for their valuable comments and suggestions to improve the quality of this special issue.
To protect our loving ‘Mother Nature’ from the ever increasing chemical pollution associated with the organic transformations,
scientists are continuously trying to modify their chemical processes to make them environmentally benign and sustainable.
As a result, the last decade has shown tremendous progress in green credentials in organic transformations. The special
thematic issue ‘Organic transformations by following green credentials- Part 1 (A)’ intends to highlight the current progress on
the development of various organic transformations with special emphasis on greener aspects. The present issue consists a total
of five review articles contributed by the leading scientists working in this field.
Nowadays, photo-irradiated technique is treated as the most sustainable strategy. Sometimes organic transformations are not
possible to carry out at room temperature by using conventional strategies, but in many occasions, those reactions were accomplished
easily under photochemical conditions. As a result, photo-induced strategy has become a valuable tool for the synthesis
of diverse organic scaffolds. The first contribution of this thematic issue by Kaur et al. deals with an up-to-date literature on the
photo-induced synthesis of various fused five-membered oxygen containing heterocycles.
Recently, spirooxindoles, specially of 3,3'-spirooxindoles, have drawn considerable attention as many of these scaffolds
possess significant biological activities. As a result, a large number of methods are being reported for the synthesis 3,3'-
spirooxindoles under various reaction conditions. In the second contribution, Deepthi et al. summarizes the recent literature
related to the synthesis of 3,3'-spirooxindoles by using green credentials that include aqueous mediated reactions, multicomponent
strategies and photocatalysis.
Aziridines are being used as versatile precursors of various naturally occurring bioactive compounds including amino sugars,
β-lactams, alkaloids etc. They are also being used as a versatile intermediate in many organic syntheses due to their susceptibility
to ring-opening by facile C-N bond cleavage. In the third contribution, Santra and his group summarized recent developments
related to the synthesis of various aziridines scaffolds under different reaction conditions.
During the last few years, constant efforts have been made to carry out C-H functionalization reaction under greener conditions.
A number of modifications were reported for the C-H functionalization reactions to make them eco-friendly and sustainable.
The fourth contribution by Sarkar and Mukhopadhyay describes the current development of C-H functionalization carried
out in aqueous medium and its synthetic utilities according to carbon-carbon and carbon-heteroatom bond formations under
Pyrazole and its related derivatives are very common in naturally occurring bioactive molecules. Many drug molecules contain
pyrazole as the core structural unit. As a result, a large number of methods were reported for the efficient synthesis of these
significant scaffolds. The last contribution by Singh and Nath offers an up-to-date literature on the synthesis of various substituted
and fused pyrazole scaffolds under greener conditions.
Though today organic chemists are paying much attention to green chemistry practices, we need to adopt green credentials
as much as possible in our protocols to fulfill the challenges of sustainability.
I feel honored and really grateful to all the contributors for their efforts to design this special thematic issue for Current
Green Chemistry (CGC). I am very much thankful to the senior journal manager and the entire editorial team of Current Green
Chemistry specially Ms. Humaira Bilal madam for her continued support. No words are sufficient to express my gratitude to
Prof. (Dr.) György Keglevich (Editor-in-Chief) Sir for his unconditional help and encouragement in each step. I am also thankful
to the respective reviewers for their valuable comments and suggestions to improve the quality of this special issue.
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