Merging supramolecular catalysis and aminocatalysis: amino-appended β-cyclodextrins (ACDs) as efficient and recyclable supramolecular catalysts for the synthesis of tetraketones

RSC Advances ◽  
2016 ◽  
Vol 6 (26) ◽  
pp. 22034-22042 ◽  
Author(s):  
Yufeng Ren ◽  
Bo Yang ◽  
Xiali Liao
Keyword(s):  
Reaction Mechanism ◽  
Efficient Synthesis ◽  
Supramolecular Catalysis ◽  
Supramolecular Catalysts

Efficient synthesis of tetraketones was established with well-designed amino-appended β-cyclodextrins (ACDs) in water, while possible reaction mechanism merging supramolecular catalysis and aminocatalysis was proposed.

An Efficient Synthesis of Furil

2012 ◽  
Vol 554-556 ◽  
pp. 764-767 ◽  
Author(s):  
Lu Yao Wang ◽  
Dong Meng ◽  
Lu Li ◽  
Xin Cai
Keyword(s):  
Reaction Mechanism ◽  
Vitamin B1 ◽  
Efficient Synthesis ◽  
Uv Spectrum ◽  
Reaction Condition

By employing thiamine (vitamin B1) as the catalyst, the synthesis of furoin from furfuraldeyde has been developed. Furoin is oxidized to furil by Cu(OAc)2-NH4NO3 as an oxidant. The reaction condition is optimized and the reaction mechanism is discussed in this paper. The synthesized furoin and furil are characterized by means of Mass, IR and UV spectrum.

Palladium-catalyzed direct C–H ethoxycarbonylation of 2-aryl-1,2,3-triazoles and efficient synthesis of suvorexant

2018 ◽  
Vol 5 (4) ◽  
pp. 648-652 ◽  
Author(s):  
Rui Sang ◽  
Yang Zheng ◽  
Hailong Zhang ◽  
Xiaohua Wu ◽  
Qiantao Wang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Dft Calculations ◽  
Efficient Synthesis ◽  
Palladium Catalyzed ◽  
Diethyl Azodicarboxylate

Palladium-catalyzed direct ethoxycarbonylation with diethyl azodicarboxylate was developed and its reaction mechanism was explored by using DFT calculations.

Novel and Simple Synthesis of Brominated 1,10-Phenanthrolines

2014 ◽  
Vol 67 (6) ◽  
pp. 915 ◽  
Author(s):  
Drahomír Výprachtický ◽  
Dana Kaňková ◽  
Veronika Pokorná ◽  
Ivan Kmínek ◽  
Vagif Dzhabarov ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Thionyl Chloride ◽  
Synthesis Method ◽  
Efficient Synthesis ◽  
Sulfur Dichloride ◽  
Medium Strength ◽  
Phenanthroline Monohydrate ◽  
First Time ◽  
Brominated Compounds

A novel, simple, and reasonably efficient synthesis of 3,8-dibromo-1,10-phenanthroline, 3,6-dibromo-1,10-phenanthroline, 3,5,8-tribromo-1,10-phenanthroline, and 3,5,6,8-tetrabromo-1,10-phenanthroline is presented herein. The crucial role of a new catalyst (sulfur dichloride – SCl2) for the bromination of 1,10-phenanthroline is reported. The bromination of 1,10-phenanthroline monohydrate in the presence of SCl2 and pyridine yielded the brominated compounds, previously only possible through the complicated multi-step and tedious Skraup synthesis method. The application of the bromination catalyst SCl2 as a medium-strength Lewis acid is demonstrated for the first time, and the results are compared with the behaviours of known weak (sulfur chloride – S2Cl2) and strong (thionyl chloride – SOCl2) bromination catalysts. A reaction mechanism was proposed.

scholarly journals Amide-assisted Rearrangement of Hydroxyarylformimidoyl Chloride to Diarylurea

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6437
Author(s):  
Xizhong Song ◽  
Xiaoyu Liu ◽  
Wei Yu ◽  
Yi Jin
Keyword(s):  
Reaction Mechanism ◽  
Efficient Synthesis ◽  
Rearrangement Reaction

A novel amide-assisted rearrangement reaction of hydroxybenzimidoyl chloride has been established for the efficient synthesis of 1,3-diphenylurea derivatives. A variety of electronically and sterically different 1,3-diphenylurea derivatives can be obtained in good to excellent yields, and a proposed reaction mechanism is also presented.

scholarly journals N-Heterocyclic carbene-catalyzed direct cross-aza-benzoin reaction: Efficient synthesis of α-amino-β-keto esters

2012 ◽  
Vol 8 ◽  
pp. 1499-1504 ◽  
Author(s):  
Takuya Uno ◽  
Yusuke Kobayashi ◽  
Yoshiji Takemoto
Keyword(s):  
Reaction Mechanism ◽  
Cross Coupling ◽  
Catalytic Synthesis ◽  
Efficient Synthesis ◽  
Thermodynamic Control ◽  
Keto Esters ◽  
Direct Cross

An efficient catalytic synthesis of α-amino-β-keto esters has been newly developed. Cross-coupling of various aldehydes with α-imino ester, catalyzed by N-heterocyclic carbene, leads chemoselectively to α-amino-β-keto esters in moderate to good yields with high atom efficiency. The reaction mechanism is discussed, and it is proposed that the α-amino-β-keto esters are formed under thermodynamic control.

scholarly journals Efficient conversion of ethanol to 1-butanol and C5–C9 alcohols over calcium carbide

RSC Advances ◽  
2019 ◽  
Vol 9 (33) ◽  
pp. 18941-18948 ◽  
Author(s):  
Dong Wang ◽  
Zhenyu Liu ◽  
Qingya Liu
Keyword(s):  
Reaction Mechanism ◽  
Calcium Carbide ◽  
Efficient Synthesis ◽  
Efficient Conversion

Efficient synthesis of 1-butanol and C5–C9 alcohols from widely available bio-ethanol over CaC2 and reaction mechanism were investigated in this work.

Arylation of enelactams using TIPSOTf: reaction scope and mechanistic insight

2021 ◽  
Author(s):  
Tomasz J. Idzik ◽  
Zofia M. Myk ◽  
Łukasz Struk ◽  
Magdalena Perużyńska ◽  
Gabriela Maciejewska ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Multinuclear Nmr ◽  
Mechanistic Insight ◽  
Nmr Study ◽  
Wide Range

Triisopropylsilyltrifluoromethanesulfonate can be effectively used for the arylation of a wide range of enelactams. The multinuclear NMR study provided deep insights into the reaction mechanism.

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