58697-63-5Relevant academic research and scientific papers
Supported dual-acidic 1,3-disulfoimidazolium chlorozincate@HZSM-5 as a promising heterogeneous catalyst for synthesis of indole derivatives
Saikia, Susmita,Puri, Krishna,Borah, Ruli
, (2019)
HZSM-5-supported Br?nsted and Lewis acidic ionic solid 1,3-disulfoimidazolium chlorozincate materials ([dsim]2[ZnCl4]@HZSM-5) were synthesized with various ratios (3, 6, 9, 17 and 50% w/w). The heterogeneous materials were characterized via a variety of spectroscopic techniques. Dual acidity of these materials was determined using specified techniques. These acidic solids were examined as stable heterogeneous catalysts for the Fischer indole reaction of equimolar amounts of phenylhydrazine hydrochloride and various aliphatic or aromatic ketones at 80–90°C in neat condition to produce substituted indole derivatives. The efficient 17% ionic salt-loaded HZSM-5 composite was easily reused for ten consecutive cycles with a slight loss of its activity. The recycled catalyst was further analysed using powder X-ray diffraction and inductively coupled plasma optical emission spectrometric techniques.
2-(3'-Methoxy-4'-hydroxy-phenol)-indole
-
, (2008/06/13)
New stabilizers of polymers and co-polymers of vinyl chloride, the said stabilizers being 2-phenyl-indole derivatives corresponding to the formula: STR1 wherein R1 and R2, which are the same or different, each represent a branched- or straight-chain alkyl group containing from 1 to 12 carbon atoms, a cyclohexyl radical, a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms, a benzyloxy radical, a hydroxy radical or R1 and R2 represent together an alkylenedioxy radical containing from 1 to 3 carbon atoms, R3 represents a hydrogen atom, a methyl or methoxy radical, with the proviso that one at least of the substituents R1 or R2 does not represent an alkyl radical.
