Reactions of Saturated and Unsaturated Tertiary Alkyl Halides and Saturated Secondary Alkyl Iodides with Lithium Aluminum Deuteride. Convincing Evidence for a Single-Electron-Transfer Pathway
摘要:
Reactions of saturated secondary and tertiary alkyl halides with LiAlH4 (LAH) and LiAlD4 (LAD) have been carried out, and convincing evidence for a single-electron-transfer (SET) pathway has been obtained. Reactions involving saturated alkyl halides with LAD provide a model system in which a halogen-atom radical chain process is not possible, and therefore, the observation of large quantities tin some cases >90%) of protium in the reduction product provides strong evidence for a radical intermediate and a SET pathway. Specifically, the reaction of 2-iodooctane (10) with LAD produced octane with a deuterium content as low as 21%. Also, the reaction of the tertiary halide 2-iodo-2-methylheptane (15) with LAD produced 2-methylheptane (16) with a deuterium content as low as 8%. The effect of stoichiometry, halogen type, and reaction vessel surface on these reactions was studied. Reaction of the unsaturated tertiary halide 6-iodo-6-methyl-1-heptene (25) with LAD was also studied and was found to proceed predominantly by a SET process involving a halogen-atom radical chain process. The possibility of a carbocation intermediate in all of these reactions is discussed.
[DE] POLYMERE ENTHALTEND SUBSTITUIERTE OLIGO-TRIARYLAMIN-EINHEITEN SOWIE ELEKTROLUMINESZENZVORRICHTUNGEN ENTHALTEND DIESE POLYMERE<br/>[EN] POLYMERS CONTAINING SUBSTITUTED OLIGO-TRIARYLAMINE UNITS AND ELECTROLUMINESCENCE DEVICES CONTAINING SUCH POLYMERS<br/>[FR] POLYMÈRES CONTENANT DES UNITÉS OLIGO-TRIARYLAMINE SUBSTITUÉES ET DISPOSITIFS ÉLECTROLUMINESCENTS CONTENANT CES POLYMÈRES
申请人:MERCK PATENT GMBH
公开号:WO2013156129A1
公开(公告)日:2013-10-24
Die vorliegende Erfindung betrifft Polymere enthaltend Oligo-triarylamin- Wiederholungseinheiten, die in ortho-Position substituiert sind, Verfahren zu deren Herstellung sowie deren Verwendung in elektronischen Vorrichtungen, insbesondere in organischen Elektrolumineszenz- vorrichtungen, sogenannten OLEDs (OLED = Organic Light Emitting Diodes). Darüber hinaus betrifft die vorliegende Erfindung auch organische Elektrolumineszenzvorrichtungen enthaltend diese Polymere.