Diisopropylethylamine → Methyl 2-benzyloxycarbonylamino-3-(2,4-dichlorobenzenesulfonylamino)-2-methylpropionate

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Reaction Steps

0.103 g (0.341 mmol) of methyl 3-amino-2-benzyloxycarbonylamino-2-methylpropionate, 0.109 g (0.443 mmol) of 2,4 dichlorobenzenesulfonyl chloride and 0.237 ml (1.36 mmol) of DIEA are dissolved in 2 ml of DCM. The mixture is stirred at room temperature overnight. 2 ml are added to the reaction solution, and then the organic phase is separated off and dried over MgSO4, and the solvent is removed in vacuo. The crude product is purified by chromatography on 4 g of SiO2, EtOAc/DCM as eluent (gradient of 0-40%). 0.081 g of the desired product is obtained as an oil. MW=474 (calculated, monoisotopic), measured value: (M+H)+ 475.

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