Keywords
amines.
green synthesis
phthalic ahhydride
phthalimides
supercritical carbon dioxide
Abstract
The reactions between phthalic anhydrides and primary amines in supercritical CO2 (80-110 bar) to afford the corresponding phthalimides proceed at temperatures of 120-130 °C (aliphatic amines) or 260-275 °C (aromatic amines). The developed procedure fully complies with the principles of green chemistry and allows one to obtain target phthalimides in 65-85% isolated yields, without additional purification and extraction.
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