Convenient route to super-expanded calixpyrroles: synthesis of Calix
meso-Alkylporphyrinogen-like cyclic oligomers containing furans and pyrroles have been synthesized by "3 + 2" and "4 + 2" approaches. Condensation of 5,5,10,10,15,15-hexaethyl-21, 22-dioxatetrapyrromethane with 2,5-bis[(alpha-hydroxy-alpha, alpha-dimethyl)furan] resulted in the formation of cyclic hexamer and cyclic dodcamer. Effects of catalysts, temperature, inorganic additives, solvent, and reaction concentration were examined.
Arumugam
N
Department of Chemistry, Kangwon National University, Chun-chon 200-701, Korea.
Jang
YS
Lee
CH