Self-condensation of 2-(ethoxalylmethyl)chromones into new derivatives of isotetronic acid
作者:Vyacheslav Ya. Sosnovskikh、Daria A. Vetyugova、Alexander V. Safrygin、Oleg S. Eltsov、Pavel A. Slepukhin
DOI:10.1016/j.mencom.2018.07.032
日期:2018.7
2-(Ethoxalylmethyl)chromones undergo dimerization to dichromonyl derivatives of isotetronic acid in 62–89% yields on refluxing with 2,3-diaminopyridine in ethanol for 1–2 h.