Indoline

Part of speech: noun

Definitions

1. A chemical compound featuring a bicyclic structure with a benzene ring fused to a five-membered nitrogen-containing ring, often studied for its role in pharmaceutical and organic synthesis applications
2. An organic molecule consisting of a fused aromatic ring and a heterocyclic amine ring, commonly utilized as a scaffold in medicinal chemistry and synthetic organic chemistry
3. A heterocyclic compound characterized by a fused benzene and pyrrolidine ring system, employed in various chemical reactions and as a framework for drug development

Etymology: Indoline is a chemical coinage, built plainly from "indole" with the suffix "-ine", so its story is really the story of the word it comes from. Indole was named from "indigo", the blue dye, because it was first obtained by treating indigo with strong reagents. The chain of descent runs from the ancient river Indus, whose name gave rise to the Greek "Indikos" ("of India"), which passed into Latin and then into European languages as the name for the dye. English later shortened the dye's name to "ind", and joined it to "ole" from the Latin "oleum" (oil) to make "indole". "Indoline" is the saturated form of that ring: a compound made from indole, with its double bond partly reduced, and the "-ine" ending marks it as a member of the nitrogen-containing family of chemicals. The name was built by chemists in the same way as many modern compound names, from parts that already existed in the language, rather than from an older word that had been handed down.

Synonyms: indoline compound, indoline derivative