Indole is a compound of pyrrole and benzene in parallel.Also known as benzene and pyrrole.There are two kinds of combination way, respectively called indoles and indole.Indole and its congeners and derivatives widely exist in nature, there are natural flower oil, such as jasmine, bitter orange flower, daffodil, fragrant Roland, etc.

Indole, for example, the earliest made by indigo degradation;Indole and its homologue also exists in the coal tar;(such as jasmine essential oil, etc.) also contains indoles;Waste containing 3 - methyl indole;Many of the VAT dye is indole derivatives;Animal is an essential amino acid tryptophan indole derivatives;Some physiological activity is very strong natural substances, such as alkaloids, auxin, etc, are indole derivatives.

Indole is a kind of imide, has a weak alkaline;Double bond of heterocyclic general addition reaction does not occur;Under the action of strong acid, can happen two aggregation and three polymerization;In special conditions, to the aromatic electrophilic substitution reaction, hydrogen on three priority be replaced, if use sulfonyl chloride reaction, can get a 3 - chloro indole.On the three also can produce a variety of reactions, such as formation of grignard reagent, and aldehyde condensation, and the mannich reaction, etc.

Natural products containing widely in bitter orange flower oil, orange oil, lemon oil, lemon oil, orange oil, white pomelo peel oil, jasmine oil, and other essential oils.

Can be widely used in jasmine, lilac, orange flower, gardenia, honeysuckle, lotus, narcissus, yilan, grass, Hester prynne floral fragrance.Also often share to fitting with methyl indole with artificial civet, trace amounts can be used for the chocolate, raspberries, strawberries, bitter orange, coffee, nuts, cheese, grape and aroma compound essence etc.

27 60 GB regulation to allow the use of edible spices.Is used to make cheese, citrus, coffee, nut, grape, strawberry, raspberry, chocolate, fruit cups, jasmine, lily essence, etc.