Zn(Proline)2-catalyzed Knoevenagel condensation under solvent-free/aqueous conditions and biological evaluation of products
作者:Zeba N. Siddiqui、T. N. Mohammed Musthafa、Shagufta Praveen、Farheen Farooq
DOI:10.1007/s00044-010-9376-4
日期:2011.12
A novel approach was adopted for the synthesis of series of Knoevenagel condensation products from 5-chloro-3-methyl-1-phenylpyrazole-4-carboxaldehyde with different cyclic active methylene compounds, using water soluble and recyclable Zn(Proline)(2) as a Lewis acid catalyst both under solvent-free condition and using water as a reaction medium in good yields. In each conversion, the catalyst was successfully recovered and recycled without significant loss in yield and selectivity. The compounds were screened for their antimicrobial activity.
Siddiqui, Zeba N.; Asad, Mohammad, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2009, vol. 48, # 11, p. 1609 - 1613