Reacción #58623

Ecuación de reacción

methyl 2-({[(trichloroacetyl)amino]carbonyl}amino)thiophene-3-carboxylate

bromine

→

title compound

Methyl 5-bromo-2-({[(trichloroacetyl)amino]carbonyl}amino)thiophene-3-carboxylate

Disolventes

acetic acid

acetic acid

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONAfter the addition
2. 2
   OtroThe solvent was evaporated under vaccum
3. 3
   Otrothe residue was triturated with H2O

Procedimiento

To a stirred solution of methyl 2-({[(trichloroacetyl)amino]carbonyl}amino)thiophene-3-carboxylate (1 eq) in glacial acetic acid (20 mL) was added a solution of bromine (1.3 eq) in glacial acetic acid (5 mL) slowly over a period of 5 min. After the addition was complete, the resulting dark solution was stirred for 30 mins at RT. The solvent was evaporated under vaccum and the residue was triturated with H2O. The title compound was obtained by filtration (99%) as an off-white solid. The product was used in the next step without any further purification after drying for 2 days under P2O5. LC/MS (ES, M+H=425).

Fuente