Development of Four-Component Synthesis of Tetra- and Pentasubstituted Polyfunctional Dihydropyrroles: Free Permutation and Combination of Aromatic and Aliphatic Amines

2013 ◽  
Vol 15 (4) ◽  
pp. 183-192 ◽  
Author(s):  
Longyun Lv ◽  
Sichao Zheng ◽  
Xiaotie Cai ◽  
Zhipeng Chen ◽  
Qiuhua Zhu ◽  
...  
Keyword(s):  
Aliphatic Amines ◽  
Aromatic And Aliphatic Amines

Iron-Catalyzed One-pot Synthesis of Indole-tethered Tetrasubstituted Pyrroles and Their Transformations to Indolizino[8,7-b]indole Derivatives

Synthesis ◽  
2021 ◽  
Author(s):  
Xue Xiao ◽  
Xiao-Hui Chen ◽  
Xian-Xun Wang ◽  
Wan-Zhen Li ◽  
Hai-Lei Cui
Keyword(s):  
Aliphatic Amines ◽  
Electrophilic Cyclization ◽  
Indole Derivatives ◽  
One Pot ◽  
One Pot Synthesis ◽  
Aromatic And Aliphatic Amines

We have developed an efficient iron-catalyzed one-pot reaction of tryptamines, ynones and nitroolefins affording indole-tethered tetrasubstituted pyrroles in acceptable to good yields. Other aromatic and aliphatic amines can also be utilized in this process delivering corresponding highly functionalized tetrasubstituted pyrroles. Indolizino[8,7-b]indole derivatives could be obtained through TFA, TfOH or Fe(OTf)3-mediated cyclizations via dearomatization of indole. Unexpected dibrominated products, 7,9-dibromo-6,11-dihydro-5H-indolizino[8,7-b]indoles, were formed when PTAP was employed as electrophilic cyclization promoter.

tert-Butyl(3-cyano-4,6-dimethylpyridin-2-yl)carbonate as a green and chemoselective N-tert-butoxycarbonylation reagent

2019 ◽  
Vol 43 (17) ◽  
pp. 6549-6554
Author(s):  
Fangyu Du ◽  
Qifan Zhou ◽  
Yang Fu ◽  
Hanqi Zhao ◽  
Yuanguang Chen ◽  
...  
Keyword(s):  
Aliphatic Amines ◽  
Tert Butyl ◽  
Aromatic And Aliphatic Amines

The use of tert-butyl(3-cyano-4,6-dimethylpyridin-2yl) carbonate as a chemoselective tert-butoxycarbonylation reagent for aromatic and aliphatic amines has been demonstrated (30 examples).

scholarly journals N-Acetylation of Amines in Continuous-Flow with Acetonitrile—No Need for Hazardous and Toxic Carboxylic Acid Derivatives

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1985 ◽  
Author(s):  
György Orsy ◽  
Ferenc Fülöp ◽  
István M. Mándity
Keyword(s):  
Carboxylic Acid ◽  
Continuous Flow ◽  
Scale Up ◽  
Drug Substance ◽  
Aliphatic Amines ◽  
Aromatic And Aliphatic Amines

A continuous-flow acetylation reaction was developed, applying cheap and safe reagent, acetonitrile as acetylation agent and alumina as catalyst. The method developed utilizes milder reagent than those used conventionally. The reaction was tested on various aromatic and aliphatic amines with good conversion. The catalyst showed excellent reusability and a scale-up was also carried out. Furthermore, a drug substance (paracetamol) was also synthesized with good conversion and yield.

Synthesis of β-amino alcohols using MgO as a new catalyst under solvent-free conditions

2008 ◽  
Vol 86 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Mona Hosseini-Sarvari
Keyword(s):  
Ring Opening ◽  
Amino Alcohols ◽  
Solvent Free ◽  
Aliphatic Amines ◽  
Solvent Free Conditions ◽  
Ring Opening Of Epoxides ◽  
High Yields ◽  
Aromatic And Aliphatic Amines

MgO catalyzed efficiently the ring opening of epoxides with a range of aromatic and aliphatic amines to produce β-substituted alcohols in high yields under solvent-free conditions. Exclusive trans stereoselectivity is observed for cyclic epoxide.Key words: MgO, β-amino alcohols, solvent-free, epoxide, amine.

The effect of aromatic and aliphatic amines on copper electrowinning from acidic sulphate electrolyte

2010 ◽  
Vol 104 (2) ◽  
pp. 169-177 ◽  
Author(s):  
H.H. Abdel-Rahman ◽  
A.M. Ahmed ◽  
A.A. Harfoush ◽  
A.H.E. Moustafa
Keyword(s):  
Aliphatic Amines ◽  
Copper Electrowinning ◽  
Sulphate Electrolyte ◽  
Acidic Sulphate ◽  
Aromatic And Aliphatic Amines

scholarly journals Additive-free selective methylation of amines with formic acid over a Pd/In2O3 catalyst

2021 ◽  
Author(s):  
Caroline Genre ◽  
Idir Benaissa ◽  
Timothé Godou ◽  
Mathieu Pinault ◽  
Thibault Cantat
Keyword(s):  
Formic Acid ◽  
Transfer Hydrogenation ◽  
Aliphatic Amines ◽  
Reaction Proceeds ◽  
Aromatic And Aliphatic Amines

Formic acid is used as the sole carbon and hydrogen source in the methylation of aromatic and aliphatic amines to methylamines. The reaction proceeds via a formylation/transfer hydrogenation pathway over a solid Pd/In2O3 catalyst without the need for any additive.

Kinetics of Reactions of 9-Isothiocyanatoacridine with Aromatic and Aliphatic Amines and Fluorescence Properties of the 1-Acridin-9-yl-3-alkyl(aryl)thioureas Obtained

1994 ◽  
Vol 59 (12) ◽  
pp. 2632-2640 ◽  
Author(s):  
Dana Mazagová ◽  
Pavol Kristian ◽  
Gejza Suchár ◽  
Ján Imrich ◽  
Marián Antalík
Keyword(s):  
Nucleophilic Addition ◽  
Addition Reaction ◽  
Spectroscopic Method ◽  
Reaction Rates ◽  
Aliphatic Amines ◽  
Phenyl Isothiocyanate ◽  
Alkyl Aryl ◽  
Nucleophilic Addition Reaction ◽  
Kinetics Of ◽  
Aromatic And Aliphatic Amines

Kinetics of nucleophilic addition reaction of 9-isothiocyanatoacridine with seventeen aliphatic and aromatic amines in organic solvents has been studied by the VIS spectroscopic method. 9-Isothiocyanatoacridine reacted by about two orders of magnitude faster than phenyl isothiocyanate. The reaction rates of aliphatic amines were markedly affected by steric effects. Excepting 1-acridin-9-yl-3-butylthiourea (IIIo), the products obtained exhibited weaker fluorescence than the starting 9-isothiocyanatoacridine.

Efficient, continuous N-Boc deprotection of amines using solid acid catalysts

2021 ◽  
Author(s):  
Jing Wu ◽  
Chunming Zheng ◽  
Bryan Li ◽  
Joel M. Hawkins ◽  
Susannah L. Scott
Keyword(s):  
Solid Acid ◽  
Solid Acids ◽  
Solid Acid Catalysts ◽  
Aliphatic Amines ◽  
Acid Catalysts ◽  
Aromatic And Aliphatic Amines

Rapid, catalytic N-Boc deprotection of aromatic and aliphatic amines is achieved using readily-available porous inorganic solid acids in flow.

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