4,9-dibromo-[1,2,5]thiadiazolo[3,4-g]quinoxaline synthesis

5synthesis methods

Product Name:4,9-dibromo-[1,2,5]thiadiazolo[3,4-g]quinoxaline
CAS Number:141215-31-8
Molecular formula:C8H2Br2N4S
Molecular Weight:346

131543-46-9 Synthesis

131543-46-9
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4,7-dibromobenzo[c][1,2,5]thiadiazole-5,6-diamine

141215-32-9
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4,9-dibromo-[1,2,5]thiadiazolo[3,4-g]quinoxaline

141215-31-8
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Yield:141215-31-8 58%

Reaction Conditions:

in ethanol;water at 80; for 3 h;

Steps:

12 Preparation of 4,9-dibromo- [1,2,5] thiadiazolo [3,4-g] quinoxaline (compound l-3)

Condenser equipped with a 250 mL round bottom flask on a 4,7-dibromobenzo [c] [1,2,5] thiadiazole-5 ,6-diamine (compound l-2) 1.5 g After the insert, 38 mL ethanol, and both the injection dissolved. Then, glyoxal (40% aq.) And then injecting a 0.825 g slowly, stirred for 3 hours at 80 °. After 3 hours, there is a yellow solid product is produced by filter through methanol which the 4,9-dibromo-[1,2,5] thiadiazolo [3,4-g] quinoxaline, to obtain the (compound l-3). (Yield: 58%)

References:

KR101495152,2015,B1 Location in patent:Paragraph 0247; 0254-0255

76186-72-6 Synthesis