Synthesis of a photoresponsive cryptand and its complexations with paraquat and 2,7-diazapyrenium

Org Lett. 2014 Feb 7;16(3):684-7. doi: 10.1021/ol403343s. Epub 2014 Jan 30.

Abstract

A McMurry coupling reaction was used for the efficient synthesis of a bis(m-phenylene)-32-crown-10 based cryptand Z-3 with high yield. This photoresponsive cryptand formed host-guest complexes with paraquat derivative 4 and 2,7-diazapyrenium derivative 5. Z-3, and E-3 exhibited similar binding affinity to the small guest 4, while dramatic changes were observed in the binding affinity to the large guest 5.