《The Reaction of Iron Acetylides with Carbon Dioxide》 was written by Jurd, Peter M.; Li, Hsiu L.; Bhadbhade, Mohan; Dalgarno, Scott J.; McIntosh, Ruaraidh D.; Field, Leslie D.. COA of Formula: C5H6O2 And the article was included in Organometallics in 2020. The article conveys some information:
The acetylido Fe hydride trans-[FeH(CCH)(depe)2] reacts with an excess of CO2 at ambient pressure and temperature to form a five-membered metalalactone cis-[Fe(OC(O)CHCH-κ2C,O)(depe)2]. The reaction appears to proceed by electrophilic addition of CO2 to the β-C of the coordinated acetylide and cyclization to form the metalalactone product. At low temperature, a 2nd mol. of CO2 is incorporated to give a carboxy-substituted metalalactone cis-[Fe(OC(O)C(C(O)OH)CH-κ2C,O)(depe)2]. When the initial metal acetylido hydride is substituted at the β-acetylenic C, the addition of CO2 results in a metalalactone where the substituent is in the position adjacent to the carbonyl in the metalalactone ring. In the experimental materials used by the author, we found Ethyl propiolate(cas: 623-47-2COA of Formula: 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.COA of Formula: C5H6O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics