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CAS No. : | 5372-81-6 | MDL No. : | MFCD00008427 |
Formula : | C10H11NO4 | Boiling Point : | 345.6°C at 760 mmHg |
Linear Structure Formula : | - | InChI Key : | - |
M.W : | 209.20 g/mol | Pubchem ID : | - |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | at 200℃; for 3 h; | Step 1: 2,4-Dioxo-l,2,3,4-tetrahydro-quinazoline-7-carboxylic acid methyl esterTo a 250 mL round bottom flask, 2-amino dimethyl terephthalate (3 g, 0.0143 mol) and urea (4.3 g, 0.0717 mol) were added. The reaction mixture was stirred at 200°C for 3 h. The reaction mixture was allowed to reach 100 °C and water was added. The aqueous reaction mixture was stirred at 100°C for 5-10 min then allowed to reach room temperature. The solid was filtered, washed with chloroform dried and azeotroped with toluene to afford the title compound [2.5 g, 80percent]. This material was taken to the next step without any further purification. 1H NMR; (400 MHz, DMSO-d6): δ 11.25 (brs, 2H), 7.98 (d, 1H, J= 8.2 Hz), 7.78 (s, 1H), 7.65 (d, J= 8.2, 1.2 Hz, 1H), 3.98 (s, 3H): LC-MS (ESI): Calculated mass: 220.0; Observed mass: 221.0 [M+H]+ (RT: 0.19 min) |
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