41120-12-1Relevant academic research and scientific papers
A simple and efficient one-step synthesis of 2,4,10a-triaryl-1,10a-dihydro- 2H-pyrazino[2,1-b][1,3] benzothiazoles catalyzed by p-toluene sulfonic acid
Ravindran,Muthusubramanian,Selvaraj,Perumal
, p. 509 - 515 (2007)
A series of 2,4,10a-triaryl-1,10a-dihydro-2H-pyrazino[2,1-b][1,3] benzothiazoles were prepared in good yields by the reaction of 2-[(2-oxo-2-arylethyl) anilino]-1-aryl-1-ethanones with 2-aminothiophenol in the presence of p-toluenesulfonic acid under solv
Ultrasound-mediated synthesis of N,N-bis(phenacyl)aniline under solvent-free conditions
He, Jingyu,Shi, Lanxiang,Liu, Sijie,Jia, Peng,Wang, Juan,Hu, Ruisheng
, p. 213 - 216 (2014/03/21)
An efficient method for the synthesis of N,N-bis(phenacyl)anilines was developed via smooth condensation of anilines with α-bromoacetophenones in the presence of sodium carbonate as acid acceptor and polyethylene glycol 400 (PEG 400) as catalyst at room t
Synthesis and photochemical properties of 2,4,6,-triaryl-4h-1,4-oxazines
Tan, Hongbo,Xin, Hongxing,Yan, Hong
, p. 359 - 373 (2014/03/21)
A series of 2,4,6-triaryl-4H-1,4-oxazines was synthesized, and their photochemical properties were studied. The 2,4,6-triaryl-4H-1,4-oxazines underwent photoreaction to N-(1-methoxy-2-oxo-2-arylethyl)-N-arylformamides determined by 1H NMR, 13C NMR, MS, and single crystal X-ray diffraction analyses.
Synthesis of 4H-1,4-oxazines as transthyretin amyloid fibril inhibitors
Li, Weipeng,Duan, Xiaowei,Yan, Hong,Xin, Hongxing
supporting information, p. 4546 - 4550 (2013/08/23)
4H-1,4-oxazines were designed as transthyretin (TTR) amyloid fibril inhibitors based on an analysis of the interactions between known small molecule inhibitors and TTR by molecular docking. A series of 2,4,6-triaryl-4H-1,4- oxazines was synthesized by the
Synthesis of oxathiane and morpholine from acyclic precursors: A modified Mitsunobu reaction
Paul, Nidhin,Kaladevi, Selvam,Beneto, Arockiam Jesin,Muthusubramanian, Shanmugam,Bhuvanesh, Nattamai
scheme or table, p. 6892 - 6901 (2012/09/11)
Synthesis of a set of isomeric 2,4,6-triarylmorpholines and 2,6-diaryloxathianes from the corresponding 1,5-diols has been described. The method provides an efficient route to six-membered heterocycles from acyclic diols and is found to be better than Mitsunobu procedure in yield and waste management. In a related study, the ring contraction of pyranone to two isomeric cyclopentenone derivatives through Nazarov reaction has been noticed.
Synthesis of novel 3,5,7-triaryl-5,6-dihydro-4H-1,2,5-triazepines
Ravindran, Gurusamy,Muthusubramanian, Shanmugam,Selvaraj, Sanguvan,Perumal, Subbu
, p. 133 - 136 (2008/09/16)
(Chemical Equation Presented) Several hitherto unknown 3,5,7-triaryl-5,6- dihydro-4H-1,2,5-triazepines have been synthesised by cyclocondensation of N,N-bis(phenacyl)anilines with hydrazine hydrate in ethanol or ethyleneglycol under reflux condition. Incr
A new approach to the preparation of 1,3,4-triarylpyrroles
De Zeng, Xing,Chen, Yi
, p. 490 - 492 (2007/10/03)
A class of 1,3,4-triaryl-2,5-dihydropyrroles were synthesized using the McMurry coupling reaction as the key step. The non-catalytic photoconversion of 1,3,4-triaryl-2,5-dihydropyrroles furnished 1,3,4-triarylpyrroles in good yields (63-89%). It was found
Study on photochromism of diarylethenes with a 2,5-dihydropyrrole bridging unit: A convenient preparation of 3,4-diarylpyrroles from 3,4-diaryl-2,5- dihydropyrroles
Chen, Yi,Zeng, De X.,Xie, Nan,Dang, Yi Z.
, p. 5001 - 5005 (2007/10/03)
Symmetric and nonsymmetric diarylethenes with a 2,5-dihydropyrrole bridging unit have been prepared, and the photochromic properties are investigated. Both symmetric and nonsymmetric diarylethenes with 2,5-dihydropyrrole bridging units undergo reversible ring-opening and ring-closing photoisomerization reactions in nonpolar solvents with UV/vis light, and some of them exhibit good fatigue resistance and no marked degradation detected after 10 cycles via an on/off switch. In polar solvents, however, photochromic diarylethenes with 2,5-dihydropyrrole bridging units produce 3,4-diarylpyrrole derivatives instead of the ring-closing isomer of diarylethenes with UV light irradiation. A class of N-substituted 3,4-diphenylethenes with 2,5-dihydropyrrole bridging units were prepared and used as templates to investigate the conversion reactions. The mechanism of photoconversion of 3,4-diaryl-2,5-dihydropyrroles to 3,4-diarylpyrroles was explored as well.
Photochemistry of N-heterocycles. 7: Light induced reductive ring contractions of sixmembered cyclic iminium ions
Nagy, Jozsef,Madarasz, Zoltan,Rapp, Rudolf,Szoelloesy, Aron,Nyitrai, Jozsef,Doepp, Dietrich
, p. 281 - 290 (2007/10/03)
Photochemically induced reductive ring contractions, previously observed for 2,5-dihydro-1,2,4-triazines, have also been verified for 1,4-dihydropyrimidines 2a,b, the dihydro-1,2,4,5-tetrazine 9, and dihydro-1,3,5-triazines 11a,b giving rise to fivemembered fully unsaturated heterocycles (pyrroles 4a,b, imidazoles 13a,b, and triazole 10, respectively). The 1,4-dihydropyrazines 15a-j tend to decompose in acidified 2-propanol in the dark, but on irradiation they also undergo reductive ring contraction furnishing solely the 1,2,5-triarylpyrroles 16a-d rather than the (a priori also possible) isomeric 1,3,4-triarylpyrroles 17a-d. In contrast, the 3,6-diphenylpyrid-azine 18 gives the 4-isopropyl-analogue 19 in low yield upon irradiation in hydrogen chloride saturated 2-propanol. Wiley-VCH Verlag GmbH, 2000.
Beckmann fragmentation of diphenylcarbamoylated N-aryldiphenacylamine dioximes. New method for the synthesis of imidazooxadiazolones
Coskun, Necdet,Tat, Fatma Tirli,Gueven, Oezden Oezel
, p. 3889 - 3894 (2007/10/03)
N-Aryl-N,N-diphenacylamine dioximes were prepared by the reaction of corresponding arylamines with α-bromoacetophenone oxime in ethanol-water at room temperature. These compounds reacted with aryl isocyanates in acetonitrile to give imidazooxadiazolones 9. The probable mechanism of the reaction is discussed.
