A synthesis of tetronic acid [furan-2(3H),4(5H)-dione] and three analogues
作者:T. P. C. Mulholland、R. Foster、D. B. Haydock
DOI:10.1039/p19720001225
日期:——
A synthesis of four tetronicacids [furan-2(3H),4(5H)-diones] is described. On treatment with triethylamine the readily prepared diethyl α-(chloroacetyl)malonate yielded ethyl 2-ethoxy-4,5-dihydro-4-oxofuran-3-carboxylate (ca. 50%), which was converted into tetronicacid by alkali, and into 3-ethoxycarbonyltetronic acid by water, in high yields. 5-Methyl-, 5-phenyl-, and 5-ethyl-tetronic acids were