Gao, Wen-Chao et al. published their research in RSC Advances in 2014 | CAS: 13669-10-8

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.COA of Formula: C9H10O3S

Iodine-catalysed sp3 C-H sulfonylation to form β-dicarbonyl sulfones with sodium sulfinates was written by Gao, Wen-Chao;Zhao, Jin-Jin;Chang, Hong-Hong;Li, Xing;Liu, Qiang;Wei, Wen-Long. And the article was included in RSC Advances in 2014.COA of Formula: C9H10O3S This article mentions the following:

An efficient and easily handled method for β-dicarbonyl sulfones with sodium sulfinates as the sulfonyl source was developed. This transformation was involved in the iodine-catalyzed sp3 C-H sulfonylation of β-dicarbonyl compounds In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8COA of Formula: C9H10O3S).

Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.COA of Formula: C9H10O3S

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics