Reactivities of Stable Rotamers. XXXI. Bromine Addition to the Olefinic Moiety of Rotameric 1-(9-Fluorenyl)-2-(1-methylethenyl)naphthalenes
作者:Michinori Oki、Katsumi Shionoiri、Katsumasa Otake、Masaru Ono、Shinji Toyota
DOI:10.1246/bcsj.66.589
日期:1993.2
Reaction of bromine with the ap form of the title compound afforded a normal addition compound, whereas the same with the sp form did no addition compound but a pair of bromo-olefins and a cyclized product, formation of which can be rationalized by deprotonation from and by attack of the π-system of the fluorene group on the intervening cation. The abnormal reactions of the sp form are the consequence
溴与标题化合物的 ap 形式反应提供了正常的加成化合物,而与 sp 形式相同的没有加成化合物,而是一对溴烯烃和环化产物,其形成可以通过从 和通过芴基团的 π 系统对介入阳离子的攻击。sp 形式的异常反应是芴部分的空间效应的结果,该效应阻止了在反应位点形成四面体碳。环化产物的立体化学通过 NOE 实验和 X 射线晶体学确定。仅一种异构体的立体选择性形成通过起始材料的结构合理化,其立体动力学通过动态核磁共振方法研究,和溴阳离子的攻击方向。为了比较中间阳离子的归宿,用对甲苯磺酸银处理来自 ap 形式的加合物。发现这个比例...
Reactivities of Stable Rotamers. XXXVIII. Reaction of Chlorine with 1-(9-Fluorenyl)-2-(1-methylethenyl)naphthalene Rotamers: Outstanding Solvent Effects on Product Distribution and Ritter Type Reactions in Acetonitrile
作者:Michinori Oki、Takanori Hirose、Michihiko Aki、Nobuhiro Morita、Emiko Nose、Yasukazu Kataoka、Masaru Ono、Shinji Toyota
DOI:10.1246/bcsj.69.3345
日期:1996.11
chlorine were done as carbontetrachloride, nitromethane, and acetonitrile solutions. The ap-isomer afforded a mixture of the corresponding addition product and olefins that are derived by deprotonation of the intervening chloro-carbocation. The product distribution was strongly affected by the solvents, although chlorinated olefins are the main products in carbontetrachloride. The sp-isomer yielded
Reactivities of Stable Rotamers. XXXIII. Addition of Positive Bromine Compounds to the Olefinic Moiety of 1-(9-Fluorenyl)-2-(1-methylethenyl)naphthalene Rotamers and Facile Benzene Ring Cleavage in One of the Intermediates from the<i>sp</i>-Form
作者:Michinori Oki、Kiyoka Maeda、Tadashi Akinaga、Yasukazu Kataoka、Shinji Toyota
DOI:10.1246/bcsj.67.2825
日期:1994.10
Addition of positive brominecompounds to the title olefins was carried out with use of N-bromosuccinimide–water and t-butyl hypobromite and the results are compared with the case of bromineaddition. In the case of the ap-isomer, the reactions reported here all produce bromo-olefins in addition to an additionproduct, in contrast to the case of bromine which gives only an additionproduct. The sp-isomer