Sulfanilic acid functionalized mesoporous SBA-15: A water-tolerant solid acid catalyst for the synthesis of uracil fused spirooxindoles as antioxidant agents
作者:ROBABEH BAHARFAR、RAZIEH AZIMI
DOI:10.1007/s12039-015-0910-2
日期:2015.8
Incorporating sulfanilic acid as a hydrophobic Brønsted acid inside the nanospaces of SBA-15 led to a water-tolerantsolidacidcatalyst, SBA-15-PhSO3H, which showed excellent catalytic performance in synthesis of uracil-fused spirooxindoles in aqueous ethanol. The synthesized compounds were evaluated for their antioxidant activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging assay. Green
Dual role of the polymer supported catalyst PEG-OSO3H in aqueous reaction medium: synthesis of highly substituted structurally diversified coumarin and uracil fused spirooxindoles
作者:Sanjay Paul、Asish R. Das
DOI:10.1016/j.tetlet.2012.12.079
日期:2013.2
coumarin fused spirooxindole derivatives, making this strategy very useful in diversity-oriented synthesis (DOS). This synthesis was established to follow the group-assistant-purification chemistry process (GAP) avoiding traditional chromatography, whereupon recrystallization purifications appear to be a very good alternative to the traditional classical methods. The aqueous reactionmedium, dual role