Ultraviolet spectra and methoxy and methylenedioxy groups of some aromatic compounds and alkaloids. X. Electronic spectra of 1-tetralone, homophthalide, 3,4-dihydroisoquinoline, and 3,4-dihydroisoquinolinium compounds was written by Santavy, Frantisek;Valka, Ivo. And the article was included in Collection of Czechoslovak Chemical Communications in 1980.Reference of 4741-62-2 This article mentions the following:
The UV of the title compounds substituted by electron donating groups (OH, MeO, o-OCH2O) on the aromatic nucleus, are similar when the electron donors were at the same distance from the electron accepting substituent. The increase in the ring size from 1-indanone to 1-tetralone, or from phthalide to homophthalide had no significant effect on the position and the intensity of the A and the B bands. The changes of the UV of 3,4-dihydroisoquinolinium compounds in alk.-EtOH media is discussed. In the experiment, the researchers used many compounds, for example, 5-Methoxyisobenzofuran-1(3H)-one (cas: 4741-62-2Reference of 4741-62-2).
5-Methoxyisobenzofuran-1(3H)-one (cas: 4741-62-2) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. In nature, benzofurans have occupied an important role among the plant phenols & several pharmacologically active compounds.Reference of 4741-62-2
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem