Die palladiumkatalysierte Cocyclisierung von Allenen mit elektronenarmen Alkinen. Einige Untersuchungen zur Kupplung von Allenderivaten mit Acetylendicarbonsäuredimethylester an Palladium und Platin
作者:Constantin Stephan、Christina Munz、Heindirk tom Dieck
DOI:10.1016/0022-328x(94)80060-x
日期:1994.4
ethers even enable a one-pot synthesis (with lower yields) via catalyst-induced elimination of alcohol from an initially formed bis(alkoxy)-tetrahydronaphthalene. 4-Methylidene-palladacyclopent-2-enes can be trapped in stoichiometric reactions with allene derivatives (but not allene itself) and dimethyl acetylenedicarboxylate. Coupling of two allene moieties on platinum affords bis(methylidene)-metallacyclopentanes