Research Article
Ammonium Trifluoroacetate-Mediated Synthesis of 3,4-dihydropyrimidin-2(1H)-ones
Table 2
Conditions attempted for the ammonium trifluoroacetate-mediated synthesisa.
| | Entry | Condition adopted | Time | Yield (%) |
| | 1 | Ethanol/catalyst/RT | 12 h | 65 | | 2 | Ethanol/catalyst/80°C | 5 h | 80 | | 3 | Acetonitrile/catalyst/RT | 10 h | 83 | | 4 | Acetonitrile/catalyst/80°C | 30 min | 90 | | 5 | Neat/catalyst/RT | 20 h | 10 | | 6 | Neat/catalyst-SiO2/RT | 20 h | 15 | | 7 | Neat/catalyst/80°C | 10 min | 98 |
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aIsolated yield.
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