Vertex Pharmaceuticals, Inc.

Neil Storer

Andrea L C Robidoux

Stefania Leonardi

Jeffrey Douglas Wilson

Petra Dieterich

Petra Dietrich

The invention relates to a process for synthesizing piperazic acid and similar, ring-containing acids. The invention also relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of either or both processes in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (&ldquo;ICE&rdquo;).

Method of preparing bicyclic intermediates from piperazic acid or an ester thereof useful in the manufacture of caspase inhibitors

The invention relates to a process for simultaneously N(2)-acylating piperazic acid or an ester thereof and forming a bicyclic ring structure. The invention also relates to the use of that process step in a method of synthesizing a bicyclic compound useful as an intermediate for the production of an inhibitor of a caspase, particularly an inhibitor of interleukin-1&bgr; converting enzyme (&ldquo;ICE&rdquo;).

Method for synthesizing caspase inhibitors

Process for forming an N-acylated, N,N-containing bicyclic ring from piperazic acid or an ester thereof especially useful as an intermediate in the manufacture of a caspase inhibitor

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Oxfordshire, United Kingdom

Neil Storer