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Table 1 Optimization of reaction conditions using different catalytic amounts

From: Design and preparation of Fe3O4@PVA polymeric magnetic nanocomposite film and surface coating by sulfonic acid via in situ methods and evaluation of its catalytic performance in the synthesis of dihydropyrimidines

Entry Solvent Catalyst Amount (mg) Time (min) Yielda (%)
1 EtOH 10 Trace
2 EtOH Fe3O4@PVA-SO3H 10 10 65
3 EtOH Fe3O4@PVA-SO3H 30 10 82
4 EtOH Fe3O4@PVA-SO3H 40 10 95
5 EtOH Fe3O4@PVA-SO3H 50 10 99
6 EtOH Fe3O4@PVA-SO3H 60 10 99
7 EtOH Fe3O4@PVA-SO3H 70 10 99
  1. aIsolated yield