Adding a certain compound to certain chemical reactions, such as: 18711-15-4, name is 4,6-Dichloroisatin, belongs to indolines-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 18711-15-4, HPLC of Formula: C8H3Cl2NO2
a. 5,7-Dichloro-2H-3,1-benzoxazine-2,4(1H)-dione To a stirred solution of 4,6-dichloro-1H-indole-2,3-dione (5.00 g, 23.2 mM) in acetic acid (21 mL) and acetic anhydride (21 mL) at 80 C. was added in small portions chromium trioxide (4.12 g, 41.3 mM). The temperature of the reaction mixture was maintained between 80-90 C. during the addition of the chromium trioxide. After the addition was complete, the reaction mixture was diluted with water (100 mL) and then filtered to separate the precipitated solids. The solids were washed thoroughly with water and then dried to obtain the title compound as a yellow solid (4.13 g, 72%); MS(CI): 232 (M+H).
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Reference:
Patent; Imperial Chemical Industries, PLC; US5599814; (1997); A;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem