cycloaddition of nitrile imines with 3-alkenyl-oxindoles was catalyzed by a new chiral Mg(ClO4)2 complex of an N,N′-dioxide ligand. The reaction is so far the sole catalytic synthesis of spiro-pyrazoline-oxindole derivatives. A wide variety of substrates were explored to obtain good yields (up to 98%) and excellent enantioselectivities (up to 99%). This cycloaddition expands the scope of propargyl anion type 1
Borsche et al., Justus Liebigs Annalen der Chemie, 1942, vol. 550, p. 160,167
作者:Borsche et al.
DOI:——
日期:——
An expedient synthesis of C3-arylidene-oxindole derivatives using calcite nanoflowers as an efficient heterogeneous catalyst
作者:Dnyaneshwar Sanap、Lata Avhad、Suresh Ghotekar、Nitin D. Gaikwad
DOI:10.1016/j.inoche.2022.110387
日期:2023.3
important role in the realm of medicine. This study aims to synthesize the C3-arylindene-oxindoles derivative compounds usingcalcite nanoflowers (CaCO3 NFs) as a heterogeneous catalyst for the first time. These CaCO3 NFs prepared by the thermal decompositionmethod, which is an active and reusable catalyst for stereospecific Knoevenagel condensation reaction between 2-oxindole and aromatic aldehyde under