401630-67-9Relevant academic research and scientific papers
Synthesis of acenes via coupling of 1,4-dilithiobutadienes with diiodoarenes in the presence of CuCl
Zhou, Lishan,Nakajima, Kiyohiko,Kanno, Ken-ichiro,Takahashi, Tamotsu
supporting information; experimental part, p. 2722 - 2726 (2009/09/06)
Dilithiobutadienes prepared from diiodobutadienes reacted with diiodobenzene or diiodonaphthalene to afford substituted naphthalene, anthracene, dihydronaphthacene, and dihydropentacene derivatives in the presence of CuCl and DMPU. Dihydronaphthacene and
Coupling reaction of zirconacyclopentadienes with dihalonaphthalenes and dihalopyridines: A new procedure for the preparation of substituted anthracenes, quinolines, and isoquinolines
Takahashi, Tamotsu,Li, Yanzhong,Stepnicka, Petr,Kitamura, Masanori,Liu, Yanjun,Nakajima, Kiyohiko,Kotora, Martin
, p. 576 - 582 (2007/10/03)
Reactions of tetraiodobenzene with zirconacyclopentadienes, which were conveniently prepared from two alkynes (or diynes) and zirconocene complexes, afforded 1,2,3,4-tetrasubstituted diiodonaphthalene derivatives in good isolated yields. These 1,2,3,4-tetrasubstituted diiodonaphthalene derivatives could be converted to 1,2,3,4,5,6,7,8-octasubstituted anthracene derivatives by reaction with a second zirconacyclopentadiene. When the two zirconacyclopentadienes were different, unsymmetrical anthracenes such as 1,2,3,4-tetraethyl-5,6,7,8-tetraphenylanthracene (68% isolated yield) were obtained. On the other hand, treatment of a 2,3-dihalopyridine such as 2-bromo-3-iodopyridine with zirconacyclopentadienes gave 5,6,7,8-tetrasubstituted quinoline derivatives in good to high yields. 3,4-Dihalopyridines such as 4-chloro-3-iodopyridine reacted with zirconacyclopentadienes to afford 5,6,7,8-tetrasubstituted isoquinoline derivatives in good to high yields.
