Racemic N-Boc-4-difluoromethoxyphenylglycine was prepared by O-difluoromethylation of D-N-Boc-4-hydroxyphenylglycine under basic conditions, whereas the hexafluoropropylation reaction gives optically pure D-N-Boc-4-hexafluoropropoxyphenylglycine. D,L-4-difluoromethoxyphenylglycine was obtained by the action of TFA on the corresponding amino acid derivative.
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| http://dx.doi.org/10.1007/BF00806196 | DOI Listing |
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