Indole (CAS NO 120-72-9)
Introduction:
Indole is an imine with weak alkalinity: The double bond of the heterocyclic ring generally does not undergo addition reaction: difluorene polymerization and terpolymerization can occur under the action of strong acids; under special conditions, aromatic electrophilic substitution reactions can be performed, and the hydrogen at the 3-position is preferentially substituted. If using sulfonyl chloride reaction, 3-chloroindole can be obtained, a variety of reactions can also occur at the 3-position, such as the formation of Grignard reagents, condensed with aldehyde condensation, and Mannich reaction, etc.
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