There is provided a process for the recovery of essentially enantiomerically pure D-tartaric acid from aqueous and organic waste streams generated in the resolution of racemic 2-amino-2,3-dimethylbutyronitrile via the formation and isolation of a crystalline monobasic tartrate salt. The recovered optically pure D-tartaric acid may be efficiently recycled to provide a sustainable resolution of racemic 2-amino-2,3-dimethylbutyronitrile.

É fornecido um processo para a recuperação do ácido D-d-tartaric essencialmente enantiomerically puro dos córregos waste aqueous e orgânicos gerados na definição de 2-amino-2,3-dimethylbutyronitrile racemic através da formação e da isolação de um sal monobasic cristalino do tartrate. O ácido D-d-tartaric puro ótica recuperado pode eficientemente recycled para fornecer uma definição sustainable de 2-amino-2,3-dimethylbutyronitrile racemic.

 
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> Optically active 2R, 4S benzothiepin isomer

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