Synthesis of “Black Hole” 4,4'-Bipyridinium Cyclophane
XI Hai-Tao,b, SUN Xiao-Qiang* ,b, WEI Hai-Lin b, MENG Qi a,
PAN Yi a, HU Hong-Wen a
Chin. J. Org. Chem. . 2007, (12): 1547 -1551 .