Palladium-Catalyzed Double Carbonylation Reactions of o-Dihaloarenes with Amines in Phosphonium Salt Ionic Liquids
摘要:
Palladium-catalyzed double carbonylation of o-dihaloarenes with amines in phosphonium salt ionic liquids proceeds efficiently to give the corresponding N-substituted phthalimides. This process can tolerate a wide array of functional groups and affords products in excellent yields. The recyclability of the catalytic system was also investigated.
[EN] PREPARATION OF SUBSTITUTED PHTHALIC ANHYDRIDE, ESPECIALLY 4-CHLOROPHTALIC ANHYDRIDE<br/>[FR] PREPARATION D'UN ANHYDRIDE PHTALIQUE SUBSTITUE ET PLUS PRECISEMENT D'UN ANHYDRIDE TETRACHLOROPHTALIQUE
申请人:GEN ELECTRIC
公开号:WO2004072012A1
公开(公告)日:2004-08-26
A method for the synthesis of substituted phthalic anhydrides (IV) wherein R' is a halogen, aromatic or aliphatic group comprising 1-18 carbons, hydrogen or nitro group is the transimidation between a substituted N-alkyl phthalimide (V) wherein R is an alkyl having from 1 to 18 carbons, and a substituted tetrahydrophthalic anhydride (VI): The by product of this reaction, a substituted N-alkyl tetrahydrophthalimide (VII), may be converted by aromatization to the substituted N-alkyl phthalimide (V).