Helvetica Chimica Acta

Hexahelicenophanes

H Meier, M Schwertel, H Kolshorn

Index: Meier, Herbert; Schwertel, Manfred; Kolshorn, Heinz Helvetica Chimica Acta, 2013 , vol. 96, # 11 p. 2009 - 2019

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Abstract

Abstract A reaction sequence was studied for the preparation of cyclophanes 12, which contain 2, 7-bis (2-phenylethenyl) naphthalene chromophores and polymethylenedioxy chains of different length. The irradiation of 12 in the presence of I 2 led then, by oxidative cyclization processes, to the hexahelicenophanes 13, provided that the methylenedioxy chain of 12 is long enough (n= 8, 10). As competitive photoreaction, a twofold [2π+ 2π] ...

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