Syntheses and properties of graphyne fragments: trigonally expanded dehydrobenzo [12] annulenes

…, Y Gao, Y Shimizu, S Seki, K Kamada…

Index: Tahara, Kazukuni; Yamamoto, Yuki; Gross, Dustin E.; Kozuma, Hiroyoshi; Arikuma, Yoko; Ohta, Koji; Koizumi, Yoshiko; Gao, Yuan; Shimizu, Yo; Seki, Shu; Kamada, Kenji; Moore, Jeffrey S.; Tobe, Yoshito Chemistry - A European Journal, 2013 , vol. 19, # 34 p. 11251 - 11260

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Citation Number: 18

Abstract

Abstract We present herein the synthesis and properties of the largest hitherto unknown graphyne fragment, namely trigonally expanded tetrakis (dehydrobenzo [12] annulene) s (tetrakis-DBAs). Intramolecular three-fold alkyne metathesis reactions of hexakis (arylethynyl) DBAs 9 a and 9 b using Fürstner's Mo catalyst furnished tetrakis-DBAs 8 a and 8 b substituted with tert-butyl or branched alkyl ester groups in moderate and fair yields, ...