McDonald, Brian G. published the artcileConversion of (2-chlorallyl)amines into heterocyclic compounds. I. 2-Methylindoles, 1,5,6,7-tetrahydro-3-methylindol-4-ones, and related heterocycles, Related Products of indole-building-block, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1975), 1446-50, database is CAplus.
The allylanilines I [R = H, Me, (CH2)2CO2Me, R1 = H; R = H, R1 = 2-Ph, 2-CO2Me, 3-Me, 4-Cl, 4-Me, 4-CO2Me], prepared by condensation of R1C6H4NHR with CH2:CClCH2R2 (R2 = Cl, I), gave 5-75% II on heating with polyphosphoric acid at 100° or BF3-MeOH at 150°. This method was used for the preparation of other heterocyclic compounds e.g. condensation of 4,7-dichloroquinoline with R3NHCH2CCl:CH2 (R3 = Ph, Et) and cyclization of the product formed gave 30-42% pyrroloquinolines III.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about 57663-18-0. 57663-18-0 belongs to indole-building-block, auxiliary class Indole,Ester, name is Methyl 2-methyl-1H-indole-5-carboxylate, and the molecular formula is C11H11NO2, Related Products of indole-building-block.
Referemce:
https://www.nature.com/articles/s41429-020-0333-2,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles