Open AccessNovel catalytic method synthesis of calix[4]pyrroles using Preyssler and Wells-Dawson heteropolyacids
Author(s) -
Ali Gharib,
Manouchehr Jahangir,
J. W. Scheeren
Publication year - 2011
Publication title -
polish journal of chemical technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.279
H-Index - 20
eISSN - 1899-4741
pISSN - 1509-8117
DOI - 10.2478/v10026-011-0027-4
Subject(s) - catalysis , yield (engineering) , chloroform , pyrrole , environmentally friendly , chemistry , organic chemistry , nuclear chemistry , materials science , metallurgy , ecology , biology
Novel catalytic method synthesis of calix[4]pyrroles using Preyssler and Wells-Dawson heteropolyacids A catalytic synthesis of calix[4]pyrroles and N -confused calix[4]pyrroles by reaction of dialkyl or cycloalkyl ketones with pyrrole was performed using Preyssler, sodium30-tungsto pentaphosphate, [NaP 5 W 30 O 110 ] 14- and Wells-Dawson heteropolyacids as acidic catalysts. The process occurred under mild, eco-friendly and environmental friendly conditions and as a reusable, green catalyst at room temperature for 6 hours. The results showed that the yield for this synthesis is excellent with the use of Preyssler and Wells-Dawson type tungstophosphoric heteropolyacid, H 6 [P 2 W 18 O 62 ], catalysts. The synthesis reaction of calix[4]pyrroles and N -confused calix[4]pyrroles was developed using different solvents and the best yields were obtained in chloroform.