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ChemicalBook CAS DataBase List 4-AMINO-N-(6-CHLORO-5-METHOXY-4-PYRIMIDINYL)BENZENESULFONAMIDE
5018-23-5

4-AMINO-N-(6-CHLORO-5-METHOXY-4-PYRIMIDINYL)BENZENESULFONAMIDE synthesis

3synthesis methods
-

Yield:5018-23-5 85.3%

Reaction Conditions:

in N,N-dimethyl-formamide at 88 - 90; for 3 h;

Steps:

2 Example 2 Preparation of sulfadoxine intermediate condensate

In the reaction flask was added N, N- dimethylformamide 150g,Sulfacetamide sodium 110g was added with stirring,4,6-dichloro-5-methoxypyrimidine 50 g,Heated to 88 ~ 90 for 3 hours,DMF was depressurized to a temperature of 120 ° C, 200g of hot water above 90 ° C was added and dissolved. The diluted hydrochloric acid was adjusted to pH 7.0-8.0, cooled and filtered. The filtrate was adjusted to pH 3.8 with 5% diluted hydrochloric acid. The material was filtered and dried to give the sulfadoxine intermediate condensate 75g, yield 85.3%.Total impurities in HPLC: 1.75%, HPLC Max. Single impurity: 0.55%. See Figure 1 for details.

References:

CN104557735,2017,B Location in patent:Paragraph 0043; 0044

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