4-Hydroxybenzaldehyde → HCID 20225450, compound

Participants

Reaction Steps

4-allyloxybutyl-p-toluene sulfonate is reacted with p-hydroxybenzaldehyde in the presence of KOH and C2H5OH to form 4-(4-allyloxybutoxy)benzaldehyde which is reacted with malonic acid in the presence of pyridine to form p-(4-allyloxybutoxy)cinnamic acid. The acid is esterified with CH3OH and sulfuric acid to yield the methyl ester, namely methyl p-(4-allyloxybutoxy)cinnamic carboxylate. This methyl ester is then reacted with TosMIC in Et2O/DMSO in the presence of sodium hydride or other strong base to form the substituted pyrrole, represented as follows: ##STR7##

Provenance & Evidence