879-65-2,879-65-2, 2-Quinoxalinecarboxylic acid is a quinoxaline compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
Preparation X. Preparation of 2-quinoxalyl isocyanate Diphenylphosphoryl azide (1.23 mL) was added to a solution of triethylamine (800 ul) and 2-quinoxaline carboxylic acid 1 g (5.74 mmol) stirring in 10 mL of dry dimethylformamide in an icewater cooling bath (2). The reaction was stirred for 2.33 h during which time the reaction was allowed to warm to 25. The reaction was poured into ice water and extracted three times with diethyl ether. The combined organic extracts were dried over anhydrous sodium sulfate, filtered, and then concentrated in vacuo. The crude azide was dissolved in 15 mL of benzene and heated at reflux for 1.5 h. The solvent was removed in vacuo to provide the desired solid isocyanate. FT IR indicated a strong isocyanate absorption.
As the paragraph descriping shows that 879-65-2 is playing an increasingly important role.
Reference£º
Patent; Bristol-Myers Squibb Company; US5198560; (1993); A;,
Quinoxaline – Wikipedia
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