The author of 《Visible-Light-Induced Regioselective Alkylation of Coumarins via Decarboxylative Coupling with N-Hydroxyphthalimide Esters》 were Jin, Can; Yan, Zhiyang; Sun, Bin; Yang, Jin. And the article was published in Organic Letters in 2019. Application In Synthesis of 2-Hydroxy-4-methoxybenzaldehyde The author mentioned the following in the article:
An efficient photocatalytic decarboxylative 3-position alkylation of coumarins by using alkyl N-hydroxyphthalimide esters as alkylation reagents has been developed. A variety of NHP esters derived from aliphatic carboxylic acids (primary, secondary, and tertiary) has been proved to be tolerated for this decarboxylation process, affording a broad scope of 3-alkylated coumarin derivatives in moderate to excellent yields. This protocol was highlighted by its mild conditions, readily available starting materials, operational simplicity, and wide functional group tolerance. The experimental part of the paper was very detailed, including the reaction process of 2-Hydroxy-4-methoxybenzaldehyde(cas: 673-22-3Application In Synthesis of 2-Hydroxy-4-methoxybenzaldehyde)
2-Hydroxy-4-methoxybenzaldehyde(cas: 673-22-3) is the main component of root bark essential oil of Periploca sepium Bunge. It is a potential tyrosinase inhibitor present in African medicinal plants. 2-Hydroxy-4-methoxybenzaldehyde was used in the synthesis of Schiff base ligand.Application In Synthesis of 2-Hydroxy-4-methoxybenzaldehyde
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem