Ishii, Hisashi published the artcileFischer indolization and its related compounds. XIII. Measurement of the nuclear magnetic resonance spectra of ethyl indole-2-carboxylate derivatives using the shift reagent and its application, Name: Ethyl 7-methoxy-1H-indole-2-carboxylate, the publication is Yakugaku Zasshi (1979), 99(4), 413-20, database is CAplus and MEDLINE.
Proton NMR spectra of several Et indole-2-carboxylate derivatives in the presence of a shift reagent, tris(dipivalomethanato)-europium [Eu(DPM)3], were measured in CDCl3 and good straight lines were obtained on plotting induced shift vs. concentration of Eu(DPM)3 for each signal. Application of the McConnell-Robertson equation to interpret pseudocontact shifts of the indole derivatives gave good agreement between measured and predicted shifts. The relation between substituents of indoles and the position of the coordinated Eu atom is discussed.
Yakugaku Zasshi published new progress about 20538-12-9. 20538-12-9 belongs to indole-building-block, auxiliary class Indole,Ester,Ether, name is Ethyl 7-methoxy-1H-indole-2-carboxylate, and the molecular formula is C12H13NO3, Name: Ethyl 7-methoxy-1H-indole-2-carboxylate.
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