... Tetrahedron. Volume 58, Issue 4, 21 January 2002, Pages 741–755. ... footed resorcinarene 18 19 and this affords a shorter route to polymer-bound cavitands, through the preparation of 11 (Scheme 6). Treatment of 18 with four equivalents of 1,2-difluoro-4,5-dinitrobenzene in the ...