Synthesis and crystal structure of 15α, 20α-di (4-hydroxylphenyl) calix [4] pyrroles and 10α, 20β-di (4-hydroxylphenyl) calix [4] pyrroles

Y Han, GL Wang, JJ Sun, J Sun, CG Yan

Index: Han, Ying; Wang, Gen-Liang; Sun, Juan-Juan; Sun, Jing; Yan, Chao-Guo Tetrahedron, 2013 , vol. 69, # 49 p. 10604 - 10609

Full Text: HTML

Citation Number: 7

Abstract

Abstract In the presence of methanesulfonic acid as catalyst, the condensation reactions of 5, 5′-dialkyldipyrromethanes with p-hydroxyacetophenone in methanol resulted in a mixture of the unexpected polysubstituted 15α, 20α-di (4-hydroxylphenyl) calix [4] pyrroles and the expected 10α, 20β-di (4-hydroxylphenyl) calix [4] pyrroles in comparable lower yields. The crystal structures of the new calix [4] pyrroles and their oxyacetate derivatives ...