The author of 《Metal- and Solvent-Free Ultrasonic Multicomponent Synthesis of (Z)-β-Iodo Vinylthiocyanates》 were Lu, Ling-Hui; Zhou, Si-Jia; Sun, Meng; Chen, Jia-Liang; Xia, Wen; Yu, Xianyong; Xu, Xinhua; He, Wei-Min. And the article was published in ACS Sustainable Chemistry & Engineering in 2019. Formula: C5H6O2 The author mentioned the following in the article:
An eco-friendly and practical method for the ultrasonic multicomponent synthesis of diverse (Z)-β-iodovinyl thiocyanates from cheap and com. available alkynes, mol. iodine, and KSCN through an intermol. H-bonding assistance strategy was developed. In the experiment, the researchers used many compounds, for example, Ethyl propiolate(cas: 623-47-2Formula: C5H6O2)
Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Formula: C5H6O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics