Fersiynau electronig

Dogfennau

Dangosydd eitem ddigidol (DOI)

The clean room-temperature synthesis of 2,2′-dilithio-1,1′-dibromoferrocene from 1,1′-dibromoferrocene is reported. When this dilithium compound is quenched with electrophiles, the synthesis of 2,2′-disubstituted-1,1′-dibromoferrocene is facilitated. For example, quenching with 1,2-dibromohexafluoropropane as an electrophile precursor gives 1,1′,2,2′-tetrabromoferrocene in high yield. The similar dilithiation reaction of 1,1′,2,2′-tetrabromoferrocene produces 3,3′-dilithio-1,1′,2,2′-tetrabromoferrocene, which in turn furnishes 1,1′,2,2′,3,3′-hexabromoferrocene again in high yield. Essentially the bromines are added in pairs beginning with the readily available 1,1′-dibromoferrocene. All 2,2′-dihalogeno-1,1′-dibromoferrocenes have been obtained and characterized. The reaction sequence when it is continued in an iterative fashion should ultimately afford decabromoferrocene; however, highly brominated products such as octabromoferrocene, nonabromoferrocene, and decabromoferrocene are not isolated cleanly because of their poorer solubility, as the synthetic method has been optimized in nonpolar solvents. Just as 1,1′-dibromoferrocene has played an important role in the broader synthesis of other ferrocenes, it is fully expected that 1,1′,2,2′-tetrabromoferrocene and 1,1′,2,2′,3,3′-hexabromoferrrocene will play similar roles.

Allweddeiriau

Iaith wreiddiolSaesneg
Tudalennau (o-i)3240-3244
Nifer y tudalennau5
CyfnodolynOrganometalics
Cyfrol40
Rhif y cyfnodolyn19
Dyddiad ar-lein cynnar22 Medi 2021
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 11 Hyd 2021

Cyfanswm lawlrlwytho

Nid oes data ar gael
Gweld graff cysylltiadau