Derivatives of 2-aryl-3, 4-bis (carbomethoxy) furans (Ilia and 5) gave the corresponding acids la and b, which with thionyl chloride in the presence of a catalytic amount of DMFA were converted to the acid dichlorides (lla and b). In the absence of DMFA, Ib formed the anhydride of 2-(p-anisyl)-3, 4-bis (carboxy) furan. The diamines (IVa and b) were obtained from lla and b. With hydrazine, lla and b were converted into the cyclic hydrazides (Va and ...