Chemoenzymatic synthesis of ketomethylene tripeptide isosteres
摘要:
A chemoenzymatic method is described for the synthesis of a desired ketomethylene tripeptide isostere. The key step is an enzymatic hydrolysis, which removes the C-terminal ester-protecting group under mild conditions without epimerizing the existing stereogenic center and produces the desired stereoisomer in high enantiomeric excess (98% de, 97% ee). The method is short with overall 15-20% yields after seven synthetic steps from readily available starting materials being obtained. (C) 2005 Published by Elsevier Ltd.
Chemoenzymatic synthesis of ketomethylene tripeptide isosteres
摘要:
A chemoenzymatic method is described for the synthesis of a desired ketomethylene tripeptide isostere. The key step is an enzymatic hydrolysis, which removes the C-terminal ester-protecting group under mild conditions without epimerizing the existing stereogenic center and produces the desired stereoisomer in high enantiomeric excess (98% de, 97% ee). The method is short with overall 15-20% yields after seven synthetic steps from readily available starting materials being obtained. (C) 2005 Published by Elsevier Ltd.