Preparation of protected amino acids
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United States of America Patent
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Issued Date -
Dec 25, 2003
app pub date -
Jun 21, 2002
filing date -
Jun 21, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention involves a process for preparing protected amino acids. The process produces a di-tert-butyl amino ester or an N-protected di-tert-butyl amino ester by transesterification of an acidic amino acid or an N-protected acidic amino acid. By-products of the transesterification reaction may be recycled for use as part of the starting material. The N-protected di-tert-butyl amino ester may be hydrogenated to form a di-tert-butyl amino ester, which may subsequently form a di-tert-butyl ester hydrocholride salt.
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