bibenzyls and related ethane derivatives in high yields. Other diselenides were easily caused to cleave to give various aromatic and aliphatic olefins in good yields together with elemental selenium. Lepidopterene, [2.2]paracyclophane, and benzocyclobutene were prepared by thermal cleavage of their corresponding phenylselenomethyl-substituted compounds as an application of the pyrolysis concerned.
Novel electron transfer mechanism in lithium alanate reduction of benzylic halides
作者:P.R. Singh、J.M. Khurana、Alok Nigam
DOI:10.1016/s0040-4039(01)81782-2
日期:1981.1
Occurrence of a new electrontransfer mechanism in the LiAlH4 reduction of 9-chloromethylanthrancene, diphenylchloromethane and 9-bromofluorene is demonstrated. Alanate anion serves as a source of electrons and hydrogen atoms.
Reactions of copper(II) halides with aromatic compounds—XI
作者:J.M. Mancilla、D.C. Nonhebel、J.A. Russell
DOI:10.1016/0040-4020(75)80155-4
日期:1975.1
9-Alkyl and 9-arylanthracenes react with copper(II) bromide in methanol to give 10-alkyl (or aryl)-10-methoxyanthrones as the major product. 9-Methylanthracene additionally affords 10-methoxy-10-methoxymethylanthrone. The formation of all these products can be interpreted in terms of an initial electron-transfer oxidation of the aromatic moiety to the radical cation.
The flash vacuum pyrolysis of benzyl phenyl selenides gave bibenzyls and diphenyl diselenide in excellent yields. This type of reaction was successfully applied to the synthesis of the title compounds.
communication reports a novel and efficient synthesis of lepidopterene from 9-(chloromethyl)anthracene. Furthermore, the radical nature of the process is unambiguously established through the obtention of several 9-anthracenemethyl derivatives, which are formed via a common 9-anthracenemethyl radical intermediate, derived from 9-(iodomethyl)anthracene.