94835-37-7Relevant academic research and scientific papers
Ultrasound-assisted synthesis, photophysical behaviour and single crystal X-ray analysis of highly functionalized prenylarenes
Krishnan, Manjula,Singh, Fateh V
, (2022/02/17)
A rapid, ultrasound assisted base-catalysed metal free synthesis of a novel series linear prenylarenes 17 incorporated with donor-acceptor functionalities is described via carbanion-induced ring transformation of 4-amino-6-aryl-3-cyano-2H-pyran-2-ones 15 with 6-methylhept-5-en-2-one 16 at room temperature with high yields. Notably, all of the synthesised prenylarenes exhibited blue fluorescence in the 406–468 nm region. The stokes shift, optical band gap, and quantum yield of compounds 17a-17l were computed using their absorption and emission spectra. A significant positive solvatochromic effect was observed, and concentration studies revealed the non-aggregating behaviour of synthesised prenylarenes. Single crystal X-ray diffraction analysis of 17d revealed that crystal belongs to triclinic system with P-1 space group with twisted phenyl rings.
Synthesis, spectral characterization and photophysical studies of tetrahydroquinolines
Kennedy, L. John,Singh, Fateh V.,Subashini, C.
, (2020/10/18)
A metal-free, ultrasound-assisted, fast synthesis of fluorescent N-Boc-protected 1,2,3,4–tetrahydroquinolines 9a-p is described through carbanion-induced ring transformation of 6-aryl-2H-pyran-2-ones 7 with tert?butyl 3-oxopiperidine-1-carboxylate 8 under
Transition metal-free synthesis of sterically hindered allylarenes from 5-hexene-2-one
Althagafi, Ismail,Elagamy, Amr,Nemaysh, Vishal,Pratap, Ramendra,Rai, Reeta,Shah, Chandan,Shaw, Ranjay,Singh, Harpreet
supporting information, p. 6276 - 6286 (2020/09/07)
A simple, efficient and transition metal-free strategy was established for the synthesis of highly functionalized, sterically hindered allylarenes (6, 7 & 8) by base-mediated ring transformation of 2-oxo-6-aryl-4-(methylthio/sec-amino)-2H-pyran-3-carbonit
Base-promoted regioselective synthesis of 1,2,3,4-terahydroquinolines and quinolines from N-boc-3-piperidone
Shally,Althagafi, Ismail,Singhal, Divya,Panwar, Rahul,Shaw, Ranjay,Elagamy, Amr,Pratap, Ramendra
, (2019/11/11)
An efficient synthesis of 1,2,3,4-tetrahydroquinolines with donor and acceptor group has been delineated by base mediated ring transformation of 6-aryl-4-substituted-2H-pyran-2-one-3-carbonitriles by N-boc-3-piperidone followed by consecutive deprotection
White light induced E/Z-photoisomerization of diphenylamine-tethered fluorescent stilbene derivatives: Synthesis, photophysical, and electrochemical investigation
Mishra, Shachi,Awasthi, Pallavi,Singh, Jagriti,Gupta, Rahul Kumar,Singh, Vikram,Kant, Ruchir,Jeet, Ram,Goswami, Debabrata,Goel, Atul
, p. 3669 - 3678 (2018/04/14)
A facile synthesis and detailed photophysical investigation of E/Z-isomerization of fluorescent diphenylamine tethered stilbene derivatives (DPASs) under white light exposure have been carried out to understand the effect on fluorescence, electrochemical
A Metal-Free Approach for the Synthesis of 2-Tetralones via Carbanion-Induced Ring Transformation of 2 H -Pyran-2-ones
Shetgaonkar, Samata E.,Singh, Fateh V.
, p. 3540 - 3548 (2018/09/04)
A metal-free, ultrasound-assisted approach for the synthesis of highly functionalized 2-tetralones in high yields is described. The process involves ring transformation of 2 H -pyran-2-ones with the spirocyclic ketone 1,4-cyclohexandione monoethylene keta
Chemoselective synthesis of isolated and fused fluorenones and their photophysical and antiviral properties
Althagafi, Ismail,Shaw, Ranjay,Tang, Cheng-Run,Panwar, Rahul,Shally,Sinha, Chanda,Kumar, Amit,Zheng, Yong-Tang,Pratap, Ramendra
, p. 7477 - 7487 (2018/10/24)
Highly functionalized fluorenones were synthesized by an intramolecular cyclization of 2′′-halo-[1,1′:3′,1′′-terphenyl]-4′-carbonitriles in the presence of n-butyllithium or lithium aluminium hydride. The precursor was synthesized by ring transformation o
Chemoselective synthesis of m-teraryls through ring transformation of 2 H-pyran-2-ones by 2-(1-arylethylidene)-malononitriles
Panwar, Rahul,Shally,Shaw, Ranjay,Elagamy, Amr,Pratap, Ramendra
, p. 8994 - 9002 (2018/12/10)
We have developed a simple, efficient and chemoselective approach for the synthesis of m-teraryls by the reaction of 6-aryl-2-oxo-4-(sec.amino)-2H-pyran-3-carbonitriles and 2-(1-arylethylidene)malononitriles under basic conditions. We used 6-aryl-2-oxo-4-
Microwave directed metal-free regiodivergent synthesis of 1,2-teraryls and study of supramolecular interactions
Singh, Surjeet,Shally,Shaw, Ranjay,Yadav, Reena,Kumar, Abhinav,Pratap, Ramendra
, p. 14768 - 14777 (2016/02/19)
A microwave directed, simple and efficient synthesis of 3′-amino-5′-(sec.amino)-[1,1′:2′,1′′-teraryl]-4′-carbonitriles has been delineated through ring transformation reaction of 6-aryl-2-oxo-4-sec.amino-2H-pyran-3-carbonitriles by benzyl cyanide under ba
Synthesis, photophysical and anticancer study of D-ring extended estrone analogues
Maurya, Hardesh K.,Hasanain, Mohammad,Kumar, Ch. Pavan,Vasudeva, Prema G.,Sarkar, Jayanta,Chandrasekharam,Gupta, Atul
, p. 68843 - 68851 (2015/09/01)
A concise route for the highly substituted ring extended estrone derivatives has been established. This protocol involves very simple, facile and one step ring transformation and cyclization process. The preliminary absorption, emission spectroscopic and
