2,4-Pentadienoic acid, methyl ester → HCID 20435924, compound

Participants

Reaction Steps

In a manner analogous to that described in Example 7(B) (b), from 7.75 g of 4-ethyl-4-[2-(tetrahydro-2-pyranyloxy)ethyl]pyrazolidine-3,5-dione and 3.7 g of methyl penta-2,4-dienoate there were obtained 6.49 g (59%) of methyl 2-ethyl-2,3,5,8-tetrahydro-1,3-dioxo-2-[2-(tetrahydro-2-pyranyloxy)ethyl]-1H-pyrazolo[1,2-a]pyridazine-5-carboxylate in the form of a white solid having a melting point of 96°-97° C. (from diethyl ether).

Provenance & Evidence