Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Natural Product Communications called Preparation of O-methyl substituted 2-oxofuro- and 2-oxopyrrolidinoindolines by reductive lactonization of oxindolylacetic acids, Author is Morales-Rios, Martha S.; Rivera-Becerril, Ernesto; Lopez-Camacho, Perla Y.; Perez-Rojas, Nadia A.; Suarez-Castillo, Oscar R., which mentions a compound: 885272-25-3, SMILESS is COC2=CC=C1NC(C(C1=C2)CC(=O)O)=O, Molecular C11H11NO4, COA of Formula: C11H11NO4.
A practical procedure for the preparation of O-methyl-substituted 3a,8-dialkyl-2-oxofuroindoline derivatives was described. A reductive lactonization of the corresponding (oxindolyl)acetic acids provides a route for the formation of this class of compounds Further transformation of 2-oxofuroindolines into 2-oxopyrrolidinoindolines and then to pyrrolidinoindolines demonstrates their versatility as key intermediates in natural products synthesis. The results of single-crystal X-ray crystallog. analyses are given for five of the studied compounds The title compounds thus formed included a 3,3a,8,8a-tetrahydro-2H-furo[2,3-b]indol-2-one (furanone) derivative (I) and (3aR,8aS)-rel-1,2,3,3a,8,8a-hexahydro-5-methoxy-1-methyl-3a,8-bis(phenylmethyl)pyrrolo[2,3-b]indole (II) and related compounds, such as 5-methoxydebromoflustramine B. The synthesis of the target compounds was achieved using 2,3-dihydro-5-methoxy-1H-indole-3-acetic acid derivatives as key intermediates.
If you want to learn more about this compound(2-(5-Methoxy-2-oxoindolin-3-yl)acetic acid)COA of Formula: C11H11NO4, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(885272-25-3).
Reference:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem