2,4-Dichloro-1-isothiocyanatobenzene → Methyl 4-{[2-amino-6-({[(2,4-dichlorophenyl)amino]carbonothioyl}amino)phenyl]amino}-3-hydroxybutanoate

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Reaction Steps

To a solution of methyl 4-[(2,6-diaminophenyl)amino]-3-hydroxybutanoate (Reference Example 80; 100 mg, 0.418 mmol) in tetrahydrofuran (2 mL) was added a solution of 2,4-dichlorophenyl isothiocyanate (93.8 mg, 0.460 mmol) in tetrahydrofuran (2 mL) at 0° C. The resultant mixture was stirred at 0° C. for 1 hr and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 50-70% ethyl acetate/n-hexane gradient to give the title compound as an oil (62.5 mg, 0.141 mmol, 34%).

Provenance & Evidence