Reaction of 1-(2-hydroxyphenyl)-3-phenylpropane-1,3-dione with some phosphorus halides: A simple synthesis of novel 1,2-benzoxaphosphinines

A simple method for design of some novel 1,2-benzoxaphosphinines 2–9, was achieved. The methodology depended on cyclization 1-(2-hydroxy-phenyl)-3-phenylpropane-1,3-dione (1) as starting material with phosphorus halides in dry solvent the presence a base. Reaction substrate 1 halides, such P,P-dichlorophenylphosphine, phenyl phosphonic dichloride, phosphorodichloridate, and oxychloride toluene containing triethylamine led to predominant formation 3-benzoyl-4-hydroxy-2H-1,2-benzoxaphosphinines 2–5, respectively. Under same reaction conditions, molecular structures type 3-benzoyl-4H-1,2-benzoxaphosphinin-4-ones 6 7 were isolated by treatment pentachloride tribromide, In addition, interesting 4-(1-phenyl-ethanoyl)-1,2,λ5-benzoxaphosphinines 8 9 obtained compound acetonyl benzyl triphenylphosphonium chlorides, respectively, dioxane sodium hydride. chemical title compounds established elemental analysis spectral tools.