In the current research, a facile and green one pot synthesis of new gabapentin-lactams
(G2-G8) has been achieved by reacting gabapentin (G1) with a variety of sulfonyl chlorides. The new
lactamization protocol is furnished under the green solvent i.e., water and reaction was completed in a
short period of time by just stirring at room temperature. Whereas in some cases, annulation could not
happen and furnished un-cyclized sulfonamide products (G9-G12). The structures of the targeted compounds
were established by elemental analysis, FT-IR, 1H-NMR and mass spectrometry. The crystals
of some new lactams (G2, G3, G4, and G8) were also evaluated by single crystal X-ray diffraction.
Keywords: Crystal structure, facile reaction, gabapentin, green synthesis, lactams, sulfonamides.
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