Use of dibenzophosphole oxides in the Horner reaction: stereospecific formation of (Z)-stilbene from an erythro-β-hydroxyalkylphosphine oxide
Abstract
Treatment of the erythro-β-hydroxyalkyldibenzophosphole oxide (6), derived from (E)-stilbene oxide and lithiodibenzophosphole, with 1,5-diazabicyclo[5.4.0]undec-5-ene (DBU) in dimethyl sulphoxide (DMSO) affords (Z)-stilbene with high stereospecificity.