Process for preparing rac-bicalutamide and its intermediates

   
   

The present invention relates to a new process for the synthesis of racemic and optically active bicalutamide starting from ethyl pyruvate and methyl methacrylate. The present invention discloses processes of preparing bicalutamide intermediates including ethyl-[2-{4-fluorophenyl sulfone}]-2-hydroxy propionate, 1,2-epoxy-2-methyl propionate and 2-hydrox-2-methyl-3-(4-fluorophenylthio) propionic acid. The present invention further discloses micronized rac-bicalutamide and the preparation thereof.

La actual invención se relaciona con un nuevo proceso para la síntesis del bicalutamide racémico y ópticamente activo que empieza con el pyruvate ethyl y el methacrylate metílico. La actual invención divulga procesos de preparar intermedios del bicalutamide incluyendo el propionate de ethyl-[2-{4-fluorophenyl sulfone}]-2-hydroxy, el propionate 1,2-epoxy-2-methyl y el ácido propionic 2-hydrox-2-meti'lico-3-(4-fluorophenylthio). La actual invención más futura divulga rac-bicalutamide micronized y la preparación de eso.

 
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