Synthesis and structure of unsymmetrical cross-conjugated dienones with thienyl substituents
摘要:
By condensation of thiophenecarbaldehyde and m-nitrobenzaldehyde with furyl-, thienylmethylenecyclohexanones in basic medium 2-(het)arylmethylene-6-thienylmethylenecyclohexanones were prepared. Under the conditions of acid catalysis analogously built dienones were synthesized containing 5-nitrothiophene fragment. Based on the data of IR and (1)H NMR spectroscopy their E,E-configuration was established.