Benzyl Anthranilate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Trans-4-guanidinomethylcyclohexanecarboxylic acid hydrochloride (3.0 g, 0.013 mole) (which is prepared by the method as disclosed in Japanese Patent First Publication No. 19694/1977, C.A., 87, 53269x) and benzyl anthranilate (3.4 g, 0.015 mole) are added to pyridine (25 ml), and thereto is added dicyclohexylcarbodiimide (3.1 g, 0.015 mole), and the mixture is stirred at room temperature for 72 hours. After the completion of the reaction, water (10 ml) is added to the reaction mixture, and the mixture is stirred for 30 minutes, and the undissolved materials are filtered off. The filtrate is concentrated to driness. The resulting residue is washed with ethyl acetate (100 ml) and recrystallized from water to give N-(o-benzyloxycarbonylphenyl)-trans-4-guanidinomethylcyclohexanecarboxamide hydrochloride (3.2 g) as white crystals. m.p. 93°-95° C. is added to the reaction mixture the mixture is stirred for 30 minutes the undissolved materials are filtered off The filtrate is concentrated to driness The resulting residue is washed with ethyl acetate (100 ml) recrystallized from water

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of isatoic anhydride (8.54 g), benzyl alcohol (6.0 g), 4-dimethylaminopyridine (6.7 g), dimethylformamide (17 ml), triethylamine (5.28 g), and methylene chloride (160 ml) is refluxed overnight, diluted with an equal volume of ethyl acetate and washed with water, brine, and water. The organic solution is dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude product is purified by flash chromatography eluting with 30% ethyl acetate in hexane to give the desired product. is refluxed overnight washed with water, brine, and water The organic solution is dried over magnesium sulfate filtered concentrated in vacuo The crude product is purified by flash chromatography eluting with 30% ethyl acetate in hexane