Reaction of dimethyl acetylenedicarboxylate with derivatives of malonic acid: pentamethoxycarbonylcyclopentadienide anion, tetramethoxy-carbonylcyclopentadienone, cyanotetramethoxyfulvenolate anion, and related compounds
作者:R. C. Cookson、J. B. Henstock、J. Hudec、B. R. D. Whitear
DOI:10.1039/j39670001986
日期:——
formulation of the adducts of dimethyl malonate with dimethylacetylenedicarboxylate in the presence of pyridine and acetic acid as tautomeric octamethyl cycloheptadienoctacarboxylates [(III) and (IV)] is confirmed. Both tautomers, or the analogues from other esters of malonicacid, are converted by potassium acetate into Diels' potassium pentamethoxycarbonylcyclopentadienide (VIa). Diazomethane methylates