Diethyl Ether → Dibenzyl 5-aminoisophthalate

Beteiligte Stoffe

Reaktionsschritte

In acetic acid (15 mL) was stirred 5-nitroisophthalic acid dibenzyl ester (1.3 g, 3.3 mmol). To this was added in parts zinc dust (1.75 g, 26.6 mmol). The mixture was stirred at room temperature for 18 hours. The mixture was filtered free of insoluble material and the acetic acid solution evaporated at reduced pressure. This residue was dissolved in ethyl acetate (120 mL) and washed successively with saturated sodium bicarbonate solution (50 mL), water (50 mL), and brine (50 mL). The organic phase was dried over magnesium sulfate and evaporated in vacuo to give a solid. The solid was stirred into ether (75 mL) and brought to reflux. The solution allowed to recrystallize to give 260 mg (22%) of a white solid. MS: M+1=362.2.

Herkunft & Nachweise