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CAS No. : | 61948-86-5 | MDL No. : | MFCD22576617 |
Formula : | C9H8N2O3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | MRZRYTQAWAFKOC-UHFFFAOYSA-N |
M.W : | 192.17 | Pubchem ID : | 19604274 |
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: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
8.0 g (92%) | In ice-water; toluene; trichlorophosphate; | b) 7.3 g (0.038 mol) of 5-methoxy-1,2,3,4-tetrahydroquinazoline-2,4-dione were suspended in 52 ml (0.57 mol) of phosphorus oxychloride and heated to 105 C. for 18 hrs. The mixture was left to cool to room temperature, treated with toluene, cautiously poured on to ice-water and filtered over Dicalite. The aqueous phase was extracted with ethyl acetate, the organic phases were combined and concentrated and the residue was chromatographed over silica gel with dichloromethane as the eluent. Yield: 8.0 g (92%) of 2,4-dichloro-6-methoxy-quinazoline as yellowish crystals; m.p. 175-177 C. |
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