Tetrahedron

Ring expansion of 11H-benzo [b] fluorene-11-methanols and related compounds leading to 17, 18-diphenyldibenzo [a, o] pentaphene and related polycyclic aromatic …

Y Yang, W Dai, Y Zhang, JL Petersen, KK Wang

Index: Yang, Yonghong; Dai, Weixiang; Zhang, Yanzhong; Petersen, Jeffrey L.; Wang, Kung K. Tetrahedron, 2006 , vol. 62, # 18 p. 4364 - 4371

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Citation Number: 10

Abstract

Condensation between 7-(1, 1-dimethylethyl)-13-phenyl-8H-indeno [2, 1-b] phenanthrene and paraformaldehyde produced the corresponding 9-fluorenylmethanol derivative, which on treatment with P2O5 to promote a Wagner–Meerwein rearrangement for ring expansion furnished 14-phenyldibenzo [a, j] anthracene in 88% yield. Similarly, 17, 18- diphenyldibenzo [a, o] pentaphene possessing a helical twist and bearing two phenyl ...