3657-94-1Relevant academic research and scientific papers
Silica-supported fluoroboric acid (HBF4-SiO2) catalyzed highly productive synthesis of thiomorpholides as activators of l-asparaginase as well as the antioxidant agent
Bandgar, Babasaheb P.,Gawande, Shrikant S.,Warangkar, Suchita C.,Totre, Jalinder V.
, p. 3618 - 3624 (2010)
An efficient solvent-free procedure for the synthesis of thiomorpholides in the presence of a catalytic amount of solid-supported fluoroboric acid (HBF4-SiO2) is described. The advantages of this method are high yields, short reaction times, ease of product isolation, low cost, and the catalyst can be recycled for a number of times without significant loss of activity. Three thiomorpholides possessing electron-donating group (4c, 4g, and 4h) were exhibiting excellent stimulatory activities against Erwinia carotovora l-asparaginase. The most potent activator, compound 4h displayed the following kinetic parameters, Km = 75 μM and Vmax = 1000 μmol mg-1 min-1 and KA = 0.985 μM. Furthermore, these compounds (4g, 4h, 4c, 4f, 4a, and 4d) have also shown promising 2,2′-diphenyl-1-picrylhydrazyl (DPPH) reducing antioxidant activity (21-36%) at 1 mM concentration as compared to standard butylated hydroxyl anisole (72% at 1 mM).
