Palladium-Catalyzed Annulation Reaction of o-Bromobenzaldehydes with Carbonyl Compounds to Produce Naphthol and/or Naphthalene Derivatives
摘要:
o-Bromobenzaldehydes undergo annulation with 1,3-diaryl-2-propanones in the presence of a palladium catalyst to give the corresponding 1,3-diaryl-2-naphthols in fair to good yields. From the reaction of the aldehydes with 2-substituted 2-alkenals are formed 2,4-disubstituted 1-naphthols and/or 1,3-disubstituted naphthalenes accompanied by decarbonylation. (C) 2000 Elsevier Science Ltd. All rights reserved.
is reported. Naphthols were found to undergo facile unprecedented oxidative dearomatization with regioselective hydroxylation with phenyl selenyl bromide in open air conditions. Quaternary stereocenters were developed along with formation of sterically demanding α- and γ-ketols with high yields. Functional group tolerance like esters is revealed. A thorough study of the stereoelectronic demands of the
o-Bromobenzaldehydes undergo annulation with 1,3-diaryl-2-propanones in the presence of a palladium catalyst to give the corresponding 1,3-diaryl-2-naphthols in fair to good yields. From the reaction of the aldehydes with 2-substituted 2-alkenals are formed 2,4-disubstituted 1-naphthols and/or 1,3-disubstituted naphthalenes accompanied by decarbonylation. (C) 2000 Elsevier Science Ltd. All rights reserved.