Hexane → 2-(4-hydroxybutyl)-1H-Isoindole-1,3(2H)-dione

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A solution of 4-amino-1-butanol (5.616 g; 63 mmol) and triethylamine (12.3 ml; 88.2 mmol) in 130 ml tetrahydrofuran was treated with N-carbethoxyphthalimide (13.82 g; 63 mmol). The mixture was refluxed for 18 hours. TLC showed the formation of product (1:1 Ethyl acetate:Hexane Rf=0.3). The mixture was diluted with ethyl acetate and washed with water. The aqueous layer was extracted with more ethyl acetate and the organic layers combined, dried (MgSO4), filtered, concentrated and the residue purified by flash chromatography; 200 g silica gel column using 2:3 ethyl acetate:Hexane followed by 1:1 to provide N-(4-hydroxybutyl)phthalimide as a white solid (9.108 g; 65.9% yield). 1H NMR (300 MHz, CDCl3): 1.426 (t, 2H, J=4.93 Hz); 1.597-1.663 (m, 2H); 1.738-1.813 (m, 2H); 3.668-3.768 (m, 4H); 7.715 (m, 2H); 7.838 (m, 2H).

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