Synthesis of new macrocycles. Part III. Cyclic tetraesters from dipotassium Δ2-1,4-dicarboxylates and mono- and di-acetylenic dibromides
Abstract
Condensation of the dipotassium salts of maleic, citraconic, and phthalic acids with 1,4-dibromobut-2-yne and with 1,6-dibromohexa-2,4-diyne has afforded six new acetylenic cyclic tetraesters. Those esters with four acetylenic groups are light-sensitive.