4173-66-4Relevant academic research and scientific papers
I2-Promoted Intramolecular Oxidative Cyclization of Butenyl Anilines: A Facile Route to Benzo[b]azepines
An, Zhenyu,Ren, Yi,Liu, Yafeng,Yan, Rulong
, p. 2614 - 2617 (2021/08/06)
A metal-free approach for the synthesis of seven-membered N-heterocycles has been developed by the I2-promoted intramolecular cross-coupling/annulation of butenyl anilines. This cyclization reaction involves C?H activation and C?C bond formation and exhibits good functional group tolerance. A series of benzo[b]azepine derivatives are obtained in moderate to good yields.
Construction of N-Alkyl- and N-Arylaziridines from Unprotected Amines via C-H Oxidative Amination Strategy
Yu, Yang,Li, Meijuan,Zhang, Yong,Liu, Yonghai,Shi, Lei,Wang, Wei,Li, Hao
supporting information, p. 904 - 907 (2019/05/16)
A copper-promoted intramolecular C-H oxidative amination reaction between secondary amine (N-H) and C(sp3)-H at the benzylic position of azaarenes or α-position of ketones for the synthesis of aziridine derivatives has been developed. Moreover,
A photoredox catalyzed radical-radical coupling reaction: Facile access to multi-substituted nitrogen heterocycles
Li, Weipeng,Duan, Yingqian,Zhang, Muliang,Cheng, Jian,Zhu, Chengjian
supporting information, p. 7596 - 7599 (2016/07/06)
Visible light induced photoredox catalysis is an efficient method for radical activation. Herein, we report the photoredox catalysis involving an intramolecular radical-radical coupling reaction that proceeds through a biradical intermediate. This protocol represents a new synthetic route to construct multi-substituted N-heterocycles. Four, five and six-membered N-heterocyclic structures with a quaternary carbon center are accessible under mild conditions.
Mannich bases as synthetic intermediates: Convenient synthesis of functionalized 1,2,4-triazepines, 1,4-diazepines and 1,5-diazocines
Afsah, Elsayed M.,Keshk, Eman M.,Abdel-Rahman, Abdel-Rahman H.,Jomah, Najla F.
scheme or table, p. 577 - 584 (2011/08/03)
Transamination between the ketonic Mannich bases 1a, b and primary arylamines gave a series of ketonic sec-Mannich bases 2a - h. A variety of tetrahydro-1,2,4-triazepines 3a - f have been synthesized by treating the arylhydrazones of 2 with formaldehyde. A similar reaction with the benzenesulfonylhydrazone of 2b afforded 4. The 3-styryl-2H-1,2,4-triazepine 5 was obtained from the phenylhydrazone of 2a and cinnamaldehyde. Treatment of arylhydrazones of the 4-methoxystyryl keto base 7 with formaldehyde and cinnamaldehyde afforded the 3,4,5,6-tetrahydro-2H-1,2,4-triazepines 8a, b. Mannich reaction with 4-(p-hydroxyphenyl)-tetrahydro-1,2,4-triazepine 3d afforded the Mannich bases 9, 10 and 11. The reaction of 1b with o-phenylenediamine leads to the 1,5-benzodiazepine 13. The new tetrahydro- 1,4-diazepine and tetrahydro-1,5-diazocine Mannich bases 15 and 17 were obtained from 1b and ethylenediamine or 1,3-diaminopropane, respectively. The bi(piperidine) derivative 19 was obtained from 1a and 1,3-diaminopropane.
Amine exchange reactions in ionic liquid
Rashinkar, Gajanan,Pore, Santoshkumar,Salunkhe, Rajeshree
experimental part, p. 1750 - 1758 (2010/01/17)
An operationally simple, inexpensive, efficient, and environmentally friendly protocol for the amine exchange reactions of 3-N,N- dimethylaminopropiophenone and N,N-dimethylaminomethylferrocene with primary aryl amines is developed using the ionic liquid
A convenient synthesis of novel 1,3,4-triaryl-3,4-dihydropyrimidin-2(1H)- ones by cyclization of aromatic isocyanates with β-arylamino-1- phenylpropan-1-ones
Xue, Na,Lu, Xiuyang,Hu, Yongzhou
, p. 1095 - 1098 (2008/12/20)
(Chemical Equation Presented) A simple one-step method for preparation of novel 1,3,4-triaryl-3,4-dihydropyrimidin-2(1H)-ones has been developed by reaction of aromatic isocyanates with β-arylamino-1-phenylpropan-1-ones in refluxing toluene in the presence of KHSO4 and HCl.
Conversion of 3-benzoyl-1-methyl-4-phenyl-γ-piperidol by arylamines and arylhydrazines. Synthesis of 3-arylamino-1-oxo-1-phenylpropanes and 1,3-diarylpyrazoles and their fragmentation under electron impact
Volkov,Kutyakov,Levov,Polyakova,An, Le Tuan,Soldatova,Terentiev,Soldatenkov
, p. 1260 - 1268 (2008/09/19)
It has been established that on heating, 3-benzoyl-4-hydroxy-1-methyl-4- phenylpiperidine is ring-opened in the presence of arylamines by a type of retroaldol reaction, with subsequent transamination of the intermediate Mannich base and the formation of 3-arylamino-1-oxo-1-phenylpropanes. When using arylhydrazines this γ-piperidol is recyclized with the formation of 1,3-diarylpyrazoles and their 4,5-dihydro derivatives. The mass spectral behavior of a series of 3-arylamino-substituted 1-phenylpropanones has been studied.
Reaction of 3-benzoyl-1-methyl-4-phenyl-γ-piperidol with arylamines and arylhydrazines. Synthesis of 3-arylamino-1-oxo-1-phenylpropanes and 1,3 diarylpyrazoles and their fragmentation under electron impact
Volkov,Kutyakov,Levov,Polyakova,Anh, Le Tuan,Soldatova,Terentiev,Soldatenkov
, p. 445 - 453 (2008/12/20)
Upon heating in the presence of arylamines 3-benzoyl-4-hydroxy-1-methyl-4- phenylpiperidine decyclizes via a retroaldol type reaction with subsequent transamination of the intermediate Mannich base to give 3-arylamino-1-oxo-1- phenylpropanes. In the case of the use of arylhydrazines this γ-piperidol recyclizes to give 1,3-diarylpyrazoles and their 4,5-dihydro derivatives. The mass spectroscopic behavior of a series of 3-arylamino-substituted 1-phenylpropanones has been studied.
AMINOAMIDES WITH AN ARYLAMINE GROUP. SYNTHESIS AND MASS SPECTRA
Borisova, E. Ya.,Sitsun', Van,Moskovkin, A. S.,Golovkov, P. V.,Tubashova, I. A.,Cherkashin, M. I.
, p. 1871 - 1875 (2007/10/02)
Aminoamides of the propane series with an arylamine fragment were synthesized by transamination of β-dimethylaminopropiophenone with various aromatic amines followed by reduction and condensation of the obtained amino alcohols with benzonitrile.A mass-spe
Synthesis of Heterocyclic Compounds: Part XXVI - 3,6-Diaryl-3,4-dihydro-1,3,2-oxazaphosphorin-2-oxides
Modak, A. S.,Gogte, V. N.,Tilak, B. D.
, p. 907 - 913 (2007/10/02)
3,4-Dihydro-1,3,2-oxazaphosphorin-2-oxides (4a-r) have been prepared by the interaction of aryl β-aryl/alkylaminoethyl ketones (3a-r) with POCl3/Et3N.Various reactions of these compounds, which represent a new ring system, are reported.Few of these compou
