2,4-Disubstituted 1,3-dioxolanes were synthesized by reactions of benzaldehyde and its parachloro derivatives, as well as 3-cyclohexenecarboxaldehyde with 3-(2-propenyloxy)-1,2-propanediol. The products were brought into bromination, dichlorocarbene addition, and epoxidation reactions. It is found that when both components of the heterogeneous reaction of dioxolane ring formation have a double bond, the acid catalyst in strongly deactivated.
Chemistry of Dioxacyclanes: XI. Synthesis and Properties of Unsaturated Derivatives of 1,3-Dioxolanes
摘要:
1,3-Dioxolanes were synthesized by reactions of 3-cyclohexenecarboxaldehyde and 5-norbornene2-endo-carboxaldehyde with 1,2-ethanedithiol and 3-(2-propenyloxy)- and 3-propoxy-1,2-propanediols, as well as of propionaldehyde, benzaldehyde, and trichloroacetaldehyde with the latter two thiols. Dichlorocarbene addition, bromination, and epoxidation of the ring C=C were accomplished, and activity of the resulting products as dienophiles in Dield-Alder reactions was assessed.