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- W2014378085 abstract "Abstract Phthalic anhydride 1 was reacted with aromatic primary amines 2 in acetic acid at room temperature to yield mono acid mono amide derivatives 3. The latter were each transformed into the corresponding imides 4 by heating in the green solvent PEG-600 at 60°C high yields and in high purity in short reaction times involving a dehydrative ring closure. The above reaction of 1 with 2 in acetic acid was extended to succinic anhydride 5 and maleic anhydride 8 resulting in open chain compounds 6 and 9, respectively. The latter were cyclized, once again in the green solvent PEG-600, to the corresponding imides, i.e. succinimides 7 and maleimides 10, respectively. Each of the imides 4, 7, and 10 could be reconverted to the corresponding open chain compounds 3, 6, and 9 by heating in ethanolic KOH. Simple hydrolysis of imides 4, 7, and 10 with aq.H3PO4 yielded the corresponding dicarboxylic acids 11, 12, and 13, respectively. Treatment of maleic amide 9 and maleicimide 10 with Mg in EtOH under reflux gave the corresponding succinic amide 6 and succinicimide 7, respectively, by the chemo selective reduction of the double bond without touching the amide/carbonyl groups." @default.
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- W2014378085 date "2011-12-01" @default.
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- W2014378085 title "PEG-600 mediated simple, efficient and eco-friendly synthesis of N-substituted imides and chemo selective C =C reduction" @default.
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- W2014378085 doi "https://doi.org/10.1080/17518253.2011.571720" @default.
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