Silica-supported Sodium Hydrogen Sulfate and Amberlyst-15 : Two Efficient Heterogeneous Catalysts for Single-step Synthesis of 4(3H)-Quinazolinones from Anthranilic Acid, Ortho Esters, and Amines under Solvent Free Conditions

2004 ◽  
Vol 33 (8) ◽  
pp. 960-961 ◽  
Author(s):  
Biswanath Das ◽  
Joydeep Banerjee
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