Benzenesulfonic acid, 3-amino-5-chloro-4-methyl- → N5-(3-chloro-2-methyl-5-sulfophenyl)-L-glutamine

Participants

Reaction Steps

After 2 ml of DMF and 0.52 ml (3 mmol) of DIEA were added to 303 mg (1 mmol) of Boc-Glu-OtBu hydrochloride, 221 mg (1 mmol) of 3-amino-5-chloro-4-methylbenzenesulfonic acid, 160 mg (1.3 mmol) of HOAt and 410 mg (1.3 mmol) of HATU, the mixture was stirred at room temperature overnight. The reaction solution was diluted in water-acetonitrile and purified in accordance with the purification step A to give the protected form of the product. The protected product obtained was dissolved in 5 ml of trifluoroacetic acid and stirred for 2 hours. After the solvent was removed by distillation, the mixture was purified in accordance with the purification step A to give the title compound.

Provenance & Evidence