Calix[2]bispyrrolylarenes: New Expanded Calix[4]pyrroles for Fluorometric Sensing of Anions via Extended π-Conjugation
作者:Brijesh Chandra、Sanjeev P. Mahanta、Narendra N. Pati、Sambath Baskaran、Ravi K. Kanaparthi、Chinnappan Sivasankar、Pradeepta K. Panda
DOI:10.1021/ol3032158
日期:2013.1.18
Two new expanded calix[4]pyrroles 3 and 4 were synthesized by ‘2 + 2’ cyclocoupling of easily prepared diboryldipyrromethane 7 (by Ir-catalyzed CH-bond activation) with appropriate diiodoarenes using the Suzuki protocol. Owing to the unique design, both macrocycles exhibited extended π-conjugation and enhanced fluorescence. Upon complexation with anions (fluoride and acetate), receptor 3 displayed