Ultrasound‐Assisted Expeditious Catalyst‐Free Green Approach towards Diastereoselective Synthesis of Spiro[indoline‐3,2′‐pyrido[2,1‐ b ][1,3]oxazine]‐3′,4′‐dicarboxylate Scaffolds

2021 ◽  
Vol 6 (6) ◽  
pp. 1263-1270
Author(s):  
Kajal Mal ◽  
Suman Ray ◽  
Suvendu Maity ◽  
Khondekar Nurjamal ◽  
Prasanta Ghosh ◽  
...  
Keyword(s):  
Diastereoselective Synthesis ◽  
Catalyst Free ◽  
Green Approach ◽  
Ultrasound Assisted

ChemInform Abstract: Diastereoselective Synthesis of N-Alkylated Octahydroacridines via a Catalyst-Free SNAr Approach.

ChemInform ◽  
2016 ◽  
Vol 47 (7) ◽  
pp. no-no
Author(s):  
Nagendra Prasad Muddala ◽  
Baskar Nammalwar ◽  
Subhashini Selvaraju ◽  
Richard A. Bunce
Keyword(s):  
Diastereoselective Synthesis ◽  
Catalyst Free

Effect of heterocyclic ring system on formation of dimeric quinolones under catalyst-free conditions: a green approach

2017 ◽  
Vol 43 (12) ◽  
pp. 6993-7012 ◽  
Author(s):  
Bandi Madhu ◽  
B. Raja sekar ◽  
C. H. Venkata Ramana Reddy ◽  
P. K. Dubey
Keyword(s):  
Heterocyclic Ring ◽  
Ring System ◽  
Catalyst Free ◽  
Green Approach

scholarly journals Sonochemistry: Non-Classical Way of Synthesis

2019 ◽  
Vol 9 (6-s) ◽  
pp. 229-232
Author(s):  
Pintu Prajapati ◽  
Avani Sheth ◽  
Dhaval M Patel ◽  
Advaita Patel ◽  
Priti Mehta
Keyword(s):  
Chemical Synthesis ◽  
Chemical Reactions ◽  
Chemical Reaction ◽  
Driving Force ◽  
Current Knowledge ◽  
Theoretical Background ◽  
Green Approach ◽  
Ultrasound Assisted ◽  
Viable Approach ◽  
Detailed Picture

This review presents the detailed picture of current knowledge on ultrasound assisted chemical reactions and its green approach in chemical synthesis. This article illustrates the theoretical background and details about ultrasound, its mechanism (cavitation, the driving force) in chemical synthesis, types of reactions with different systems and its utility. All the reported applications have shown that Sonochemistry, ultrasound assisted chemical reaction is a green and economical viable approach for drug, impurity or chemical intermediate synthesis. Keywords: Cavitation, Sonocatalysis, Sonochemistry Ultrasound

Ultrasound Assisted One-Pot Synthesis of Tetrahydropyrimidne Deriva-tives through Biginelli Condensation: A Catalyst Free Green Chemistry Approach

2020 ◽  
Vol 17 ◽  
Author(s):  
Ashish Patel ◽  
Jinagna Shah ◽  
Kesha Patel ◽  
Krishna Patel ◽  
Harit Patel ◽  
...  
Keyword(s):  
Aromatic Aldehydes ◽  
Green Technology ◽  
Sustainable Chemistry ◽  
Structural Variants ◽  
One Pot ◽  
The Past ◽  
Catalyst Free ◽  
Classical Methodology ◽  
Ultrasound Assisted ◽  
Biginelli Condensation

: The chemical applications of ultrasound, "sonochemistry", has become an exciting new field of research during the past decade as it can increase reactivities by nearly a million fold. Owing to the increasing use of Green technology approach, due to its various merits over Classical methodology and as a need for sustainable Chemistry, this reaction has received renewed interest for preparing tetrahydropyrimidine (THPM) through Biginelii condensation in an environmentally thoughtful manner with improved yields. The classical reaction has been modified in the recent past with/without various catalysts and several structural variants in different solvents to synthesize a large number of Biginelli type compounds due to its diverse pharmacological properties. We reported ultrasound assisted one-pot catalyst free procedure for the synthesis of 6-Aryl substituted-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-Carbonitrile from various aromatic aldehydes, ethyl cyano-acetate and urea under a basic condition with affording isolated yield up to 99% within a reaction time of 5-20 min under mild condition. The synthesized products were characterized by MP, IR, NMR and Mass spectroscopies.

A pot-economical and diastereoselective synthesis involving catalyst-free click reaction for fused-triazolobenzodiazepines

2016 ◽  
Vol 18 (9) ◽  
pp. 2642-2646 ◽  
Author(s):  
Xiaofeng Zhang ◽  
Sanjun Zhi ◽  
Wei Wang ◽  
Shuai Liu ◽  
Jerry P. Jasinski ◽  
...  
Keyword(s):  
Click Reaction ◽  
Diastereoselective Synthesis ◽  
Polycyclic Compounds ◽  
Catalyst Free

A pot-economical synthesis involving two [3 + 2] cycloadditions for diastereoselective synthesis of novel triazolobenzodiazepine-containing polycyclic compounds.

An atmosphere and light tuned highly diastereoselective synthesis of cyclobuta/penta[b]indoles from aniline-tethered alkylidenecyclopropanes with alkynes

2018 ◽  
Vol 54 (23) ◽  
pp. 2870-2873 ◽  
Author(s):  
Bo Cao ◽  
Yin Wei ◽  
Min Shi
Keyword(s):  
Indole Derivatives ◽  
Diastereoselective Synthesis ◽  
Free Atmosphere ◽  
Catalyst Free ◽  
Wide Range

A catalyst-free atmosphere and light tuned highly diastereoselective synthesis of cyclobuta/penta[b]indoles from aniline-tethered alkylidenecyclopropanes and alkynes was developed, which provided a wide range of cyclobuta- and cyclopenta[b]indole derivatives in good yields.

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