| 摘要 |
The present invention discloses a process for dimethylation of active methylene groups. Specifically, the invention discloses aprocess for preparing3-amino-2,2- dimethylpropanamide. Compounds produced by the present dimethylation process such as 3-amino-2,2-dimethylpropanamide can be used as intermediates in the route of synthesis of therapeutic, prophylactic or diagnostic agent, for example aliskiren or cryptophycin. Particularly, the invention relates to embodiments further extending to processesfor preparing pharmaceutical dosage form comprising said therapeutic, prophylactic or diagnostic agents. More specifically, the invention relates to the use of compounds produced by the present dimethylation process for the manufacture of therapeutic, prophylactic or diagnostic agents or for the manufacture of pharmaceutical dosage forms comprising said therapeutic, prophylactic or diagnostic agents. The processes according to the present invention can be beneficially applied for the synthesis of various active pharmaceutical ingredients, such as aliskiren or crypthophycin.
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