The addition of various electrophiles to phenylseleno-substituted allyllithium, which was generated in situ by the reaction of 1-alkoxy-3-phenylseleno-1-alkene with LDA, gave the corresponding α-addition products in moderate to good yields with high regioselectivity.
Selective synthesis of 1-alkoxy-3-phenylseleno-1-alkenes and 3-phenylselenoalkanals by the reaction of diisobutylaluminum phenylselenolate with α,β-unsaturated acetals
The reaction of α,β-unsaturated acetals with diisobutylaluminum phenylselenolate followed by treatment with H2O affords the corresponding 1-alkoxy-3-phenylseleno-1-alkenes in good yields. When aq. HCl instead of H2O was employed in the workup, 3-phenylselenoalkanals were formed in good yields.