SYNTHESIS, STRUCTURE ELUCIDATION OF BETA-CHLOROFERROCENEACROLEINS ANDBETA,BETA'-DICHLORO-1,1'-FERROCENEDIACROLEINS, AND THEIR ALPHA-PHENYLDERIVATIVES AND ALPHA,ALPHA'-DIPHENYLDERIVATIVES - ATTEMPTS ON E Z ISOMERIZATION OF ALPHA-PHENYL-BETA-CHLOROFERROCENEACROLEIN AND -DIPHENYL-BETA,BETA'-DICHLOROFERROCENEDIACROLEINS/

Synthesis of beta-chloroferroceneacroleins and beta,beta'-dichloroferr ocenediacroleins starting from acetyl-, 1,1'-diacetyl, 1-phenylacetyl- and 1,1'-diphenylacetylferrocene is described. The alpha-phenyl deriv atives of beta-chloroferroceneacroleins were prepared as the mixture o f E,Z; E,E and Z,Z isomers. All ferroceneacroleins were isolated in pu re state and their configuration was elucidated by means of H-1- and C -13 NMR spectroscopy and also confirmed by quantum chemical calculatio ns. The acid catalysed E/Z isomerisation of the alpha-phenyl-beta-chlo roferroceneacroleins and diacroleins was observed and briefly studied.