2, 5‐Dialkylfuran and tetrahydrofuran compounds as structural elements of Annonaceae acetogenins like Asitrocinwere synthesized starting from furfural by Grignard reactions, lithiation of the furan ring and addition of aliphatic aldehydes. Hydrogenation of the furan rings over Pd‐catalyst gave the corresponding tetrahydrofurans. All resulting compounds showed no or rather less antimicrobial activity