Synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] and spiro[indoline-3,4′-pyrano[2,3-c]chromene] derivatives using silica-bonded ionic liquids as a recyclable catalyst in aqueous medium
Silica-bonded ionic liquids is employed as a recyclable catalyst for the synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazoles] via one-pot condensation reaction of isatin, activated methylene reagents, and 3-methyl-l-phenyl-5-pyrazolone in refluxing aq
Ultrasound promoted green synthesis of spiro[pyrano[2,3-c]pyrazoles] as antioxidant agents
Ultrasound promoted, cerium ammonium nitrate catalyzed sustainable synthesis of spiro[indoline3,4′-pyrano[2,3-c]pyrazole] derivatives (4a-l) is reported herein. The synthesized compounds were screened for their antioxidant activities as free radical scave
NaCl as a novel and green catalyst for the synthesis of biodynamic spiro heterocycles in water under sonication
An efficient and novel green catalytic protocol for the synthesis of biologically important spirooxindole derivatives is developed in a one-pot, three-component approach involving substituted isatin, activated methylene reagent, and 3-methyl-1-phenyl- 2-p
Step-economic, efficient, ZnS nanoparticle-catalyzed synthesis of spirooxindole derivatives in aqueous medium via Knoevenagel condensation followed by Michael addition
An environmentally friendly, one-pot, three-component ZnS nanoparticle-mediated synthesis of biologically important spirooxindole derivatives in water under ultrasonic irradiation is described herein. ZnS nanoparticles were synthesized by aqueous chemical
Dandia, Anshu,Parewa, Vijay,Jain, Anuj Kumar,Rathore, Kuldeep S.
experimental part
p. 2135 - 2145
(2011/10/03)
An efficient one-pot three-component reaction for synthesis of spirooxindole derivatives in water media under catalyst-free condition
An efficient, clean, and environmentally benign synthesis of spirooxindole derivatives by one-pot three-component reaction of isatins, malononitrile, and carbonyl compound in the absence of catalysis in water was described. A variety of spirooxindole deri
Zhao, Li-Qin,Zhou, Bo,Li, Yi-Qun
experimental part
p. 673 - 677
(2011/12/05)
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