Stereoselective Lithiation and Carboxylation of Boc-Protected Bicyclopyrrolidine: Synthesis of a Key Building Block for HCV Protease Inhibitor Telaprevir
摘要:
A stereoselective process for the manufacture of bicyclopyrrolidine 7 to 2 has been developed. The process utilizes a stereoselective lithiation/carboxylation sequence. The achiral diamine ligand DPBP induces excellent diastereocontrol, and resolution with (S)-THNA provides the corresponding salt of 8 in high er and dr. Subsequent processing of 8 gives 2 as the oxalate salt in an overall yield of 27% from 7 (based on total molar charge of 7). Compound 2 was obtained with high chemical, and chiral purities. The process was successfully demonstrated on >100 kg scale.
BIOCATALYTIC PROCESSES FOR THE PREPARATION OF SUBSTANTIALLY STEREOMERICALLY PURE FUSED BICYCLIC PROLINE COMPOUNDS
申请人:Mijts Benjamin
公开号:US20100063300A1
公开(公告)日:2010-03-11
The present disclosure provides substantially enantiomerically pure heterobicyclic compounds of the following structural formulas,
wherein A, M, M′, and R
5
are as described herein, and to biocatalytic processes for their preparation, and to the enzymes used in those processes.
Substantially Stereomerically Pure Fused Bicyclic Proline Compounds and Processes for Preparing Boceprevir
申请人:Lalonde James
公开号:US20120289709A1
公开(公告)日:2012-11-15
The present disclosure provides substantially enantiomerically pure heterobicyclic compounds of the following structural formulas,
wherein A, M, M′, and R
5
are as described herein, and to biocatalytic processes for their preparation, and to the enzymes used in those processes.