Synthesis of 3-Benzyl- or 3-Benzoyl-7,8-dihydro-6H-chromene Derivatives Starting from Baylis-Hillman Adducts

摘要

Recently,chemical transformations using the Baylis-Hillman adducts have been extensively investigated by us and other groups.Among them,the reaction of Baylis-Hillman acetates and beta-diketones or beta-keto esters provided a variety of interesting compounds including alkylidene cyclohexenones,2-hydroxyacetophenones,3,4-dihydro-2H-pyrans,3-alkylidenebicyclo[3.2.1]octan-8-ones,4-arylidenecyclohexane-1,3-diones,and 4-methylene-2-cyclo-hexenones.