DECARBOXYLATIVE BROMINATION OF INDOLE-2,3-DICARBOXYLIC ACIDS USING OXONE (R) OR CAN IN THE PRESENCE OF LITHIUM BROMIDE

[摘要]：The treatment of 1-methylindole-2,3-dicarboxylic acid with Oxone (R) and lithium bromide produced 3,3-dibromo-1-methyloxindole. However, the reaction of 1-benzenesulfonylindole-2,3-dicarboxylic acid with Oxone (R) and lithium bromide afforded 1-benzenesulfonyl-2,3-dibromoindole. In a similar manner, 2,3,5,6-tetrabromoindole was synthesized from 1-benzenesulfonyl-5,6-dibromoindole-2,3-dicarboxylic acid.

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