Synthesis and characterization of all-alkyl-substituted mono-, di-, and trixosapphyrins

摘要

The synthesis and characterization of the following heterosapphyrins is presented: 3,7,18,22- tetraethl-2,8,12,13,1,23-hexamethyl-27-oxasapphyrin (5), 3,8,12,13,17,22-hexaethyl-2,7,18,23- tetramethyl-15,29,-dioxasapphyrin (6), and 3,7,18,12,13,17,23-hexamethyl-15,27,29- trioxapphyrin (7). These macrocycles were synthsized from the hitherto unknown precursors methyl 3,4-dimethylfuran-2-carboxylate (11) and methyl 4-ethyl-3-methylfuran-2-carboxylate (12).