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- W2950574895 abstract "An ideal reaction system, which is aimed at sustainable chemistry, was developed. Under solvent-free conditions, quinazoline-2,4(1H,3H)-diones were obtained in good to excellent yields from 2-aminobenzonitriles with only carbon dioxide (1 bar) and a catalytic amount of base (DBU or DBN). For example, 6,7-dimethoxyquinazoline-2,4(1H,3H)-dione, which is a key intermediate of several drugs (Prazosin, Bunazosin, and Doxazosin) was synthesized successfully in 97% yield [DBU (0.2 equiv), CO2 (1 bar), 120 °C]." @default.
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- W2950574895 date "2007-08-01" @default.
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- W2950574895 title "Solvent-Free Synthesis of Quinazoline-2,4(1<i>H</i>,3<i>H</i>)-diones Using Carbon Dioxide and a Catalytic Amount of DBU" @default.
- W2950574895 doi "https://doi.org/10.1055/s-2007-983808" @default.
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