N-trityl protected aspartic acid derivatives for the preparation of
申请人:Merrell Pharmaceuticals Inc.
公开号:US05554773A1
公开(公告)日:1996-09-10
The present invention related to novel (R)-dimethyl N-tritylaspartate and novel (R)-alkyl N-trityl-4-oxo-5-phosphononorvalinate derivatives which are useful in the preparation of the class of beta-ketophosphonate NMDA antagonists.