Simple and practical halogenation of arenes, alkenes and alkynes with hydrohalic acid/H2O2 (or TBHP)
作者:Nivrutti B. Barhate、Anil S. Gajare、Radhika D. Wakharkar、Ashutosh V. Bedekar
DOI:10.1016/s0040-4020(99)00628-6
日期:1999.9
hydrogen peroxide (34 %) or tert-butylhydroperoxide (70 %) and hydrohalic acid is presented. A similar procedure of oxyhalogenation involving the in situ generation of positive halogen reagents is applied for the preparation of vicinal trans-dibromoalkanes and dichloroalkanes from alkenes. The reaction of alkenes with a combination of hydrochloric acid and hydrobromic acid with hydrogen peroxide gave a
Eine beziehung zwischen absoluter konfiguration und dem 1Lb-Cottoneffekt chiraler carbophane
作者:E. Langer、H. Lehner、K. Schlögl
DOI:10.1016/s0040-4020(01)93379-4
日期:1973.1
For opticallyactive carbophanes a method for correlating the sign of the 1Lb-Cottoneffect of the benzene chromophor with the chirality (absolute configuration) is given. The requirements and conditions for the application of the sector rule are discussed.
对于旋光性卡宾,给出了一种使苯发色团的1 L b-甲酮效应的符号与手性(绝对构型)相关的方法。讨论了适用行业规则的要求和条件。
565. Halogen derivatives of phenyl styryl ketone. Part II. Bromo-chloro-derivatives. Two cases of “extra” isomers