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ABSTRACT:
SUBMITTER: Osborne AS
PROVIDER: S-EPMC4335804 | biostudies-literature | 2008 Nov
REPOSITORIES: biostudies-literature
Osborne Andrew S AS Som Phanneth P Metcalf Jessica L JL Phillips Robert S RS
Bioorganic & medicinal chemistry letters 20080926 21
Nitration of N(alpha),N(1)-bis(trifluoroacetyl)-l-tryptophan methyl ester with HNO(3) in acetic anhydride at 0 degrees C provides N(alpha)-trifluoroacetyl-2-nitro-l-tryptophan methyl ester in 67% yield, whereas nitration in trifluoroacetic acid at 0 degrees C gives N(alpha)-trifluoroacetyl-6-nitro-l-tryptophan methyl ester in 69% yield. ...[more]