One pot, microwave-assisted copper(I)-catalyzed dithiocarbamation: A facile introduction of dithiocarbamate on imidazopyridines

2021 ◽  
Author(s):  
Kritika Laxmikeshav ◽  
Akash P Sakla ◽  
Stephy Elza John ◽  
Shankaraiah Nagula

A facile and proficient dithiocarbamation of imidazo[1,2-a]pyridines and other imidazoheterocycles with in situ generated dithiocarbamates is established using a water-soluble, stable copper(I) catalyst and molecular oxygen under microwave conditions. The...

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 117
Author(s):  
Yousef Hijji ◽  
Rajeesha Rajan ◽  
Hamdi Ben Yahia ◽  
Said Mansour ◽  
Abdelkader Zarrouk ◽  
...  

The(3R,4R,6R)-3-(((E)-2-hydroxybenzylidene)amino)-6-(hydroxymethyl)tetrahydro-2H-pyran-2,4,5-triol water-soluble Glucose amine Schiff base (GASB-1) product was made available by condensation of 2-hydroxybenzaldehyde with (3R,6R)-3-amino-6-(hydroxymethyl)-tetra-hydro-2H-pyran-2,4,5-triol under mono-mode microwave heating. A one-pot 5-minute microwave-assisted reaction was required to complete the condensation reaction with 90% yield and without having byproducts. The 3D structure of GASB-1 was solved from single crystal X-ray diffraction data and computed by DFT/6-311G(d,p). The Hirshfeld surface analysis (HSA), molecular electronic potential (MEP), Mulliken atomic charge (MAC), and natural population analysis (NPA) were performed. The IR and UV-Vis spectra were matched to their density functional theory (DFT) relatives and the thermal behavior was resolved in an open-room condition via thermogravimetry/Derivative thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC). The highest occupied molecular orbital/lowest unoccupied molecular orbital (HOMO/LUMO), density of state (DOS), and time-dependence TD-DFT computations were correlated to the experimental electron transfer in water and acrylonitrile solvents.


2021 ◽  
Author(s):  
Rafał Kusy ◽  
Karol Grela

Herein, we present (<i>Z</i>)-selective transfer semihydrogenation of alkynes based on in situ generated CuNPs in the presence of hydrogen donors, such as ammonia-borane and a protic solvent. This environmentally-friendly method is characterized by operational simplicity combined with high stereo- and chemoselectivity and functional group compatibility. Auto-oxidation of CuNPs after the semihydrogenation reaction is completed results in the formation of water-soluble ammonia complex, so that the catalyst may be reused several times by simple phase-separation with no need of any special regeneration process. Formed NH<sub>4</sub>B(OR)<sub>4</sub> can be easily transformed back to ammonia-borane or to boric acid. In addition, one-pot tandem sequence involving Suzuki reaction followed by semihydrogenation was presented.<br>


RSC Advances ◽  
2018 ◽  
Vol 8 (41) ◽  
pp. 23241-23251 ◽  
Author(s):  
Amro K. F. Dyab ◽  
Kamal Usef Sadek

We have achievedin situmicrowave assisted green syntheses of a novel cinnoline derivative inside natural sporopollenin microreactors.


2016 ◽  
Vol 35 (1) ◽  
pp. 45
Author(s):  
Naoufel Ben Hamadi ◽  
Ahlem Guesmi ◽  
Wided Nouira

Cycloaddition of the diazoalkanes to electron-deficient olefins (in situ) affords polysubstituted cyclopropanes in high yields (up to 85%). Deprotection of the ketal protecting group provided water-soluble cyclopropane-bearing carbohydrate in good yields. Antimicrobial activity screening of the synthesized compounds 8 and 9, utilizing a variety of Gram-positive (Staphylococcus aureus and Enterococcus fecalis), Gram-negative bacteria (Escherichia coli and Klebsiella pneumoniae) and yeast (Candida albicans), exhibited that all the prepared analogues acquire promising activities against both Gram-positive and Gram-negative bacteria especially compounds 9b and 9c (antimicrobial active agents against Gram-negative bacteria).


2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Adrián Ochoa-Terán ◽  
Leticia Guerrero ◽  
Ignacio A. Rivero

A simple and efficient microwave-assisted methodology for the synthesis of 4-substituted-3-methyl-1,3-oxazolidin-2-ones from amino alcohols catalyzed by a ionic liquid was developed. This novel one-pot and one-step cyclization-methylation reaction represents an easier and faster method than any other reported protocols that can be used to obtain the desired products in good yields and high purity. Applying microwave irradiation at 130°C in the presence of TBAC, dimethyl carbonate acts simultaneously as carbonylating and methylating agent and surprisingly promotes anin situbasic trans esterification when aN-acetylated amino alcohol is used as starting material. Furthermore, dimethyl carbonate worked better than diethyl carbonate in performing this reaction.


2020 ◽  
Vol 49 (5) ◽  
pp. 1393-1397 ◽  
Author(s):  
Heiko Geisler ◽  
Debora Wernitznig ◽  
Michaela Hejl ◽  
Natalie Gajic ◽  
Michael A. Jakupec ◽  
...  
Keyword(s):  
One Pot ◽  

Novel phthiocol-based organometallics with in situ formed tridentate N,O,O-coordination motif were established via three-component microwave assisted one-pot reaction.


RSC Advances ◽  
2014 ◽  
Vol 4 (60) ◽  
pp. 31672-31677 ◽  
Author(s):  
Ha-Kyung Roh ◽  
Hyun-Kyung Kim ◽  
Kwang Chul Roh ◽  
Kwang-Bum Kim

NASICON-structured LiTi2(PO4)3/rGO nanocomposite was successfully fabricated by in situ synthesis of a Li–Ti–P–O/rGO precursor by microwave-assisted one-pot method followed by calcination heat treatment. Electrodes prepared from the nanocomposites provide excellent cycling performance and rate capability, indicating great potential for their use in LIBs.


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