The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 2-(5-Methoxy-2-oxoindolin-3-yl)acetic acid(SMILESS: COC2=CC=C1NC(C(C1=C2)CC(=O)O)=O,cas:885272-25-3) is researched.Application of 17739-45-6. The article 《Mechanistic study of reversible solid-state melt isomerization of 2-oxindoles to 2-quinolinones and its occurrence in a mass spectrometer》 in relation to this compound, is published in Journal of Molecular Structure. Let’s take a look at the latest research on this compound (cas:885272-25-3).
An eco-friendly equilibrated rearrangement of a series of 2-oxo-3-indolyl acetic acids (1) with 2-oxo-1,2,3,4-tetrahydroquinoline-4-carboxylic acid derivatives (2) was investigated through a solid state melt reaction (SSMR). Mechanistic insight into the thermal rearrangement is provided by 13C-isotopic labeling. The standard mass spectra of 1 and 2 were virtually identical preventing their reliable identification. Reversible interconversion of 1 and 2 was evidenced to occur in the inlet system of a mass spectrometer under electron impact conditions. Relative abundances of fragment ions were found to be a function of temperature
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Reference:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem