Hexane → N-(N-(3-methylbenzenesulfonyl)-octahydroisoindole-1-carbonyl)-4-(N-(3,5-dichloroisonicotinoyl)amino)-(L)-phenylalanine, methyl ester

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Reaktionsschritte

N-(Octahydroisoindole-1-carbonyl)-4-(N-(3,5-dichloroisonicotinoyl)amino)-(L)-phenylalanine, methyl ester (30 mg) was dissolved in 0.15 each of CH2Cl2 and THF. To this was added m-toluenesulfonyl chloride (0.051 mmol, 9.7 mg), followed by DIPEA (0.153 mmol, 20 mg) and 4-DMAP (0.01 mmol, 1.24 mg). This mixture was stirred at rt overnight when TLC (1:2 hexane:ethyl acetate) indicated the disappearance of all starting material. The volatiles were removed in vacuo and the residue was purified by flash column chromatography on silica gel eluted with a gradient of hexane and EtOAc to yield N-(N-(3-methylbenzenesulfonyl)-octahydroisoindole-1-carbonyl)-4-(N-(3,5-dichloroisonicotinoyl)amino)-(L)-phenylalanine, methyl ester (35 mg) as a sticky foam (homogeneous by TLC (1:2 hexane:ethyl acetate)).

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