scholarly journals Catalyst- and Additive-Free Method for the Synthesis of 2-Substituted Benzothiazoles from Aromatic Amines, Aliphatic Amines, and Elemental Sulfur

ACS Omega ◽  
2020 ◽  
Vol 5 (22) ◽  
pp. 13136-13147 ◽  
Author(s):  
Xiaoming Zhu ◽  
Fengru Zhou ◽  
Yuan Yang ◽  
Guobo Deng ◽  
Yun Liang
Keyword(s):  
Aromatic Amines ◽  
Elemental Sulfur ◽  
Aliphatic Amines

Efficient Copper-Catalysed Synthesis of Carbazoles by Double N-Arylation of Primary Amines with 2,2′-Dibromobiphenyl in the Presence of Air

Synlett ◽  
2021 ◽  
Author(s):  
Tran Quang Hung ◽  
Tuan Thanh Dang ◽  
Peter Langer ◽  
Ha Nam Do ◽  
Nguyen Minh Quan ◽  
...  
Keyword(s):  
Aromatic Amines ◽  
Aliphatic Amines ◽  
Primary Amines ◽  
Coupling Reactions ◽  
Carbazole Derivatives ◽  
High Yields

AbstractAn efficient Cu-catalyzed synthesis of carbazole derivatives is reported, which proceeds by double C–N coupling reactions of 2,2′-dibromobiphenyl and amines in the presence of air. The reaction is robust, proceeds in high yields, and tolerates a series of amines including neutral, electron-rich, electron-deficient aromatic amines and aliphatic amines.

Addition of Aliphatic and Aromatic Amines to Catechol in Aqueous Solution Under Oxidizing Conditions

1989 ◽  
Vol 42 (3) ◽  
pp. 365 ◽  
Author(s):  
MK Manthey ◽  
SG Pyne ◽  
RJW Truscott
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Aromatic Amines ◽  
Aliphatic Amines ◽  
Substitution Pattern ◽  
Vinylogous Amides ◽  
The Stability

The oxidation of catechol in the presence of two aliphatic and aromatic amines has been investigated. In aqueous solutions of pH 7.0 and 11.7, the substitution pattern of the adduct was dependent on the type of amine used. Aromatic amines produced 4,5-disubstituted o-quinones, whereas aliphatic amines gave either 2,4,5-trisubstituted or 2,4-disubstituted o-quinone adducts. A rationale based upon the stability of vinylogous amides is presented to account for the observed substitution pattern.

scholarly journals Preparation and in situ use of unstable N-alkyl a-diazo-g-butyrolactams in RhII-catalyzed X-H insertion reactions

2020 ◽  
Author(s):  
Maria Eremeyeva ◽  
Daniil Zhukovsky ◽  
Dmitry Dar'in ◽  
Mikhail Krasavin
Keyword(s):  
Aromatic Amines ◽  
Aliphatic Amines ◽  
Insertion Reactions ◽  
Sterically Hindered

N-Alkyl a-diazo-g-butyrolactams previously found to be unstable and undergo unproductive dimerization to bis-hydrazones, were successfully converted immediately to various X-H insertion products with alcohols, aromatic amines and thiols via an in situ RhII-catalyzed reaction. With aliphatic amines or unreactive, sterically hindered anilines, the reaction tends to yield enamine adducts.

Copper(ii)-catalyzed oxidative N-nitrosation of secondary and tertiary amines with nitromethane under an oxygen atmosphere

2015 ◽  
Vol 51 (58) ◽  
pp. 11638-11641 ◽  
Author(s):  
Norio Sakai ◽  
Minoru Sasaki ◽  
Yohei Ogiwara
Keyword(s):  
Aromatic Amines ◽  
Oxygen Atmosphere ◽  
Aliphatic Amines ◽  
Tertiary Amines

The combination of Cu(OTf)2 and DBU under an O2 atmosphere effectively promoted the N-nitrosation of both secondary aromatic/aliphatic amines and tertiary aromatic amines with nitromethane (CH3NO2).

ChemInform Abstract: A Method for the Selective Protection of Aromatic Amines in the Presence of Aliphatic Amines.

ChemInform ◽  
2009 ◽  
Vol 40 (22) ◽  
Author(s):  
Valerie Perron ◽  
Shaun Abbott ◽  
Nancie Moreau ◽  
Devin Lee ◽  
Christopher Penney ◽  
...  
Keyword(s):  
Aromatic Amines ◽  
Aliphatic Amines ◽  
Selective Protection

Activity of ceria and ceria-supported gold nanoparticles for the carbamoylation of aliphatic amines by dimethyl carbonate

2011 ◽  
Vol 84 (3) ◽  
pp. 685-694 ◽  
Author(s):  
Raquel Juárez ◽  
Avelino Corma ◽  
Hermenegildo García
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Aromatic Amines ◽  
Au Nanoparticles ◽  
Dimethyl Carbonate ◽  
Aliphatic Amines ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

Aliphatic amines react sluggishly with dimethyl carbonate (DMC) to give a mixture of N-methylation and carbamoylation. Nanoparticulated ceria as catalyst increases, in general, conversion and selectivity toward carbamoylation. This increase in catalytic activity and selectivity toward carbamoylation is even increased by deposition of Au nanoparticles on ceria. However, in contrast to aromatic amines for which a complete selectivity toward carbamoylation using ceria-supported Au nanoparticles can be achieved, the catalytic carbamoylation of aliphatic amines by ceria-supported Au nanoparticles occurs only with moderate selectivity.

Electron-transfer fluorescence quenching by aliphatic amines

1980 ◽  
Vol 33 (1) ◽  
pp. 177 ◽  
Author(s):  
AR Watkins
Keyword(s):  
Electron Transfer ◽  
Fluorescence Quenching ◽  
Tertiary Amine ◽  
Aromatic Amines ◽  
Aliphatic Amines ◽  
Aromatic Molecule ◽  
Intermediate Products

Electron-transfer interaction of an excited aromatic molecule with an aliphatic tertiary amine leads to a pattern of intermediate products not to be expected from earlier work with aromatic amines. The reasons for this phenomenon are briefly discussed.

Benzazoles from Aliphatic Amines ando-Amino/Mercaptan/Hydroxyanilines: Elemental Sulfur as a Highly Efficient and Traceless Oxidizing Agent

2012 ◽  
Vol 14 (23) ◽  
pp. 5948-5951 ◽  
Author(s):  
Thanh Binh Nguyen ◽  
Ludmila Ermolenko ◽  
William A. Dean ◽  
Ali Al-Mourabit
Keyword(s):  
Elemental Sulfur ◽  
Aliphatic Amines ◽  
Oxidizing Agent ◽  
Highly Efficient
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