Processes for the preparation of (3R,4S)-4-((4-benzyloxy)phenyl)-1-(4-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-2-azetidinone, an intermediate for the synthesis of ezetimibe
申请人:Kansal Kumar Vinod
公开号:US20070259845A1
公开(公告)日:2007-11-08
The invention encompasses (3R,4S)-4-((4-benzyloxy)phenyl)-1-(4-fluorophenyl)-3-(3-(4-fluorophenyl)-3-oxopropyl)-2-azetidinone (Compound 2a) having an enantiomeric purity of at least about 97.5%. The invention also encompasses Compound 2a having a chemical purity of at least about 97%. The invention further encompasses processes for preparing Compound 2a from Compound 1 having the following formula:
The invention also encompasses processes for preparing a compound having the following formula:
from a compound having the following formula:
wherein R is selected from the group consisting of: H or a hydroxyl protecting group. The invention also encompasses processes for preparing Compound 2a, preferably to form Compound 2a-Form 01. Also included are processes for preparing ezetimibe from Compound 2a-Form 01 or Compound 2a prepared according to the invention, compositions containing such ezetimibe, and methods for reducing cholesterol using such compositions.
该发明涵盖了具有对映纯度至少约为97.5%的(3R,4S)-4-((4-苄氧)苯基)-1-(4-氟苯基)-3-(3-(4-氟苯基)-3-氧代丙基)-2-氮杂环己酮(化合物2a)。该发明还涵盖具有至少约为97%的化学纯度的化合物2a。该发明进一步涵盖从具有以下式的化合物1制备化合物2a的过程:该发明还涵盖从具有以下式的化合物制备具有以下式的化合物的过程:其中R选自羟基保护基或H组成的群。该发明还涵盖制备化合物2a的过程,优选形成化合物2a-Form 01。还包括从根据该发明制备的化合物2a-Form 01或化合物2a制备依泽替米的过程,含有这种依泽替米的组合物以及使用这种组合物降低胆固醇的方法。