Development of a Novel Pd-Catalyzed N-Acyl Vinylogous Carbamate Synthesis for the Key Intermediate of ICE Inhibitor VX-765
摘要:
A novel Pd-catalyzed coupling of Cbz-protected proline amide with 4-bromo-5-ethoxyfuran-2(5H)-one was developed for the synthesis of the P1-P2 unit (5) of VX-765. The process afforded quantitative coupling in the presence of water, providing a 1:1 mixture of 5 and its ethoxy epimer epi-5. Compound 5 was isolated as a single diastereomer via fractional crystallization, which was stereoselectively converted to 17 via hydrogenation, and subsequently transformed to VX-765. Nine examples of the Pd coupling are presented with yields ranging from 76-98%.
The invention relates to processes and compounds useful for producing modified aspartic acid derivatives, such as aspartic acid aldehyde moieties. Aspartic acid derivatives are useful for preparing caspase inhibitors and/or prodrugs thereof.
The invention relates to processes and compounds useful for producing modified aspartic acid derivatives, such as aspartic acid aldehyde moieties. Aspartic acid derivatives are useful for preparing caspase inhibitors and/or prodrugs thereof.
The invention relates to processes and compounds useful for producing modified aspartic acid derivatives, such as aspartic acid aldehyde moieties. Aspartic acid derivatives are useful for preparing caspase inhibitors and/or prodrugs thereof.
Process and intermediates for the preparation of aspartic acetal caspase ihnhibitors
申请人:VERTEX PHARMACEUTICALS INCORPORATED
公开号:EP2399916A1
公开(公告)日:2011-12-28
The invention relates to
a process of producing a compound of
comprising purifying a mixture of
wherein R8 is a protecting group, and purifying includes chromatographing, selectively crystallizing, or dynamically crystallizing the mixture.