Next to the 'normal' calix[4]pyrrole 1, the N-confused calix[4]pyrrole 2 is formed in substantial amounts (up to 22% yield) as side product in the acid-catalyzed condensation reaction of ketones and pyrrole. In some cases, doubly N-confused calix[4]pyrroles are also formed.
CITATION STYLE
Depraetere, S., Smet, M., & Dehaen, W. (1999). N-confused calix[4]pyrroles. Angewandte Chemie - International Edition, 38(22), 3359–3361. https://doi.org/10.1002/(SICI)1521-3773(19991115)38:22<3359::AID-ANIE3359>3.0.CO;2-K
Mendeley helps you to discover research relevant for your work.