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., [6] 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., [7] 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., [8] 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., [9] 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
transformations.
In the fifth contribution, Kumar et al., [10] 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., [11] 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.
