296790-68-6Relevant academic research and scientific papers
Silica-bonded DABCO hydrogen sulfate ((SB-DABCO)HSO4): a new dual-interphase catalyst for the diversity-oriented pseudo-five-component synthesis of bis(pyrazolyl)methanes and novel 4-[bis(pyrazolyl)methane]phenylmethylene-bis(indole)s
Shekouhy, Mohsen,Kordnezhadian, Reza,Khalafi-Nezhad, Ali
, p. 2357 - 2368 (2018)
Silica bonded n-propyl-4-aza-1-azoniabicyclo[2.2.2]octane hydrogen sulfate ((SB-DABCO)HSO4) was prepared as a new interphase dual-catalyst and was successfully applied for the diversity-oriented synthesis of bis(pyrazolyl)methanes via a one-pot
Synthetic 4,4′-(Arylmethylene)bis(1H-pyrazol-5-ols): Efficient Radical Scavengers
Qurat-ul-ain,Perveen, Shahida,Muhammad, Munira Taj,Yousuf, Sahar,Khan, Khalid Mohammed,Iqbal Choudhary
, p. 563 - 567 (2018/06/06)
Functionalized 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) 1-22 were screened for their antioxidant activity. Antioxidant activity was performed by measuring their radical scavenging activity. These compounds demonstrated diverse in vitro DPPH radical scave
Rapid cesium fluoride-catalyzed Knoevenagel condensation for the synthesis of highly functionalized 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol) derivatives
Khan, Khalid Mohammed,Muhammad, Munira Taj,Khan, Imran,Perveen, Shahnaz,Voelter, Wolfgang
, p. 1587 - 1590 (2015/02/19)
Abstract A rapid, convenient, and environmentally friendly protocol was developed for the synthesis of functionalized 4,4′-(arylmethylene)bis(1H-pyrazol-5-ols) via a tandem Knoevenagel-Michael reaction by condensing pyrazolone with readily available diffe
Design, characterization and application of new ionic liquid 1-sulfopyridinium chloride as an efficient catalyst for tandem Knoevenagel-Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with aldehydes
Moosavi-Zare, Ahmad Reza,Zolfigol, Mohammad Ali,Zarei, Mahmoud,Zare, Abdolkarim,Khakyzadeh, Vahid,Hasaninejad, Alireza
, p. 61 - 68 (2013/09/02)
In this work, novel ionic liquid 1-sulfopyridinium chloride {[Pyridine-SO3H]Cl} is synthesized, and characterized by IR, 1H and 13C NMR, UV as well as mass spectra. The ionic liquid is used as an efficient, homogeneous and reusable catalyst for the synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)s by tandem Knoevenagel-Michael reaction of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one with various aromatic and hetero-aromatic aldehydes under mild reaction conditions.
PEG-SO3H as a new, highly efficient and homogeneous polymeric catalyst for the synthesis of Bis(indolyl)methanes and 4, 4'-(Arylmethylene)- bis(3-methyl-1-phenyl-1hpyrazol-5-ol)s in water
Hasaninejad,Shekouhy,Zare,Hoseini Ghattali,Golzar
experimental part, p. 411 - 423 (2012/06/18)
In this work, a green, simple and highly efficient procedure for the synthesis of bis(indolyl)methanes and 4, 4'-(arylmethylene)-bis(3-methyl-1- phenyl-1H-pyrazol-5-ol)s [as an important class of bis(pyrazolyl)methanes] is described. The condensation of i
