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フルテキストURLKJ00004351164.pdf ( 474.3KB ) 公開日 2010-04-19
タイトルRotational isomerisum in fluorene derivatives XXIII syntheses of 1-substituted 1'-methyl-9, 9'-bifluorenyl derivatives and their conformational isomerisum
作成者Nishida, Akiko
Nishiyama, Shinichi
Fujisaki, Shizuo
Kajigaeshi, Shoji
作成者ヨミニシダ, アキコ
ニシヤマ, シンイチ
フジサキ, シズオ
カジガエシ, ショウジ
作成者別表記西田, 晶子
藤崎, 静男
梶返, 昭二
作成者所属山口大学工学部
内容記述(抄録等)The reaction of 1-substituted fluorenones (1-substituents: CH_3, F, Cl, Br, I, OCH_3, and Ph) with 1-methyl-9-fluorenyllithium gave a mixture of A (erythro) and B (threo)-isomers of 1-substituted 9-hydroxy-1'-methyl-9, 9'-bifluorenyls (2). In these cases, 2-B-isomers were obtained more abundantly than 2-A-isomers owing to the steric effects between 1-substituents and 1'-CH_3 group. 1-Substituted 1'-methyl-9, 9'-bifluorenyls (3) were prepared from the reduction of 2 with HI (method i) or the reaction of 9-bromo-1-methylfluorene with 1-substituted 9-fluorenyllithium (method ii). In these cases, 3-B-isomers were mainly obtained by method ii, whereas, 3-A-isomers by method i. Furthermore, the restricted rotation about the C(9)-C(9') bonds in 3 were investigated by DNMR method, and we could observe some rocking motion from one gauche form (a) to the other (e) in A-isomers of 1.1'-dimethyl-9, 9'-bifluorenyl (3a) and 1-fluoro-1'-methyl-9, 9'-bifluorenyl (3b).
本文言語eng
主題工学
資料タイプtext
ファイル形式application/pdf
出版者山口大学工学部
出版者ヨミヤマグチ ダイガク コウガクブ
NII資料タイプ紀要論文
ISSN0386-3433
NCIDAA0086073X
学内刊行物(紀要等)Technology reports of the Yamaguchi University
掲載誌名Technology reports of the Yamaguchi University
5
3
開始ページ143
終了ページ152
発行日1994-12
著者版/出版社版出版社版
備考本文データは国立情報学研究所において電子化したものである
リポジトリIDKJ00004351164
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/KJ00004351164