Synthesis of aryl esters of protected amino acids from aryl sulfonates
Aryl esters of Boc- and Fmoc-protected amino acids derived from electron-deficient phenols have been prepared in good yields from aryl 4- nitrobenzenesulfonates in the presence of 1-hydroxy-benzotriazole as catalyst.
Pudhom, Khanitha,Vilaivan, Tirayut
p. 5939 - 5942
(2007/10/03)
A new facile one-pot preparation of pentafluorophenyl (Pfp) and 3,4-dihydro-4-oxo-1,2,3-benzotriazine-3-yl (Dhbt) esters of Fmoc amino acids
A new one-pot procedure for the preparation of pentafluorophenyl and 3,4-dihydro-4-oxo-1,2,3-benzotriazine-3-yl esters of Nα-9-fluorenylmethyloxycarbonyl amino acids bearing no side chain protecting groups is described. The method gives the desired activated esters in high yield and purity without use of the highly allergenic DCC.
Jacobsen, Mogens Havsteen,Buchardt, Ole,Engdahl, Tom,Holm, Arne
p. 6199 - 6202
(2007/10/02)
PREPARATION OF PENTAFLUOROPHENYL ESTERS OF FMOC PROTECTED AMINO ACIDS WITH PENTAFLUOROPHENYL TRIFLUOROACETATE
A high yield procedure for the preparation of pentafluorophenyl esters of Nα-9-fluorenylmethyloxycarbonyl protected amino acids is described.The procedure utilizes pentafluorophenyl trifluoroacetate.
Green, Michael,Berman, Judd
p. 5851 - 5852
(2007/10/02)
Bis(pentaluorophenyl) sulfite - A new reagent for the synthesis of activated pentafluorophenyl esters of N-protected amino acids
A method was proposed for the preparation of bis(perfluorophenyl) sulfite, an effective new reagent for the synthesis of pentafluorophenyl esters of N-protected amino acids without racemization.
Il'ina,Davidovich,Rogozhin
p. 2539 - 2541
(2007/10/02)
9-Fluorenylmethyl Pentafluorophenyl Carbonate as a Useful Reagent for the Preparation of N-9-Fluorenylmethyloxycarbonylamino Acids and their Pentafluorophenyl Esters
9-Fluorenylmethyl pentafluorophenyl carbonate is a useful reagent for the efficient, side reaction-free introduction of N-9-fluorenylmethyloxycarbonyl protecting group into amino acids and for the subsequent preparation of their pentafluorophenyl esters.Some new compounds of both types are described.
Schoen, Istvan,Kisfaludy, Lajos
p. 303 - 305
(2007/10/02)
Preparation and Applications of Pentafluorophenyl Esters of 9-Fluorenylmethyloxycarbonyl Amino Acids for Peptide Synthesis
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Kisfaludy, Lajos,Schoen, Istvan
p. 325 - 327
(2007/10/02)
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