Chemical name: N-alpha-(9-Fluorenylmethyloxycarbonyl)-N-im-2-chlorotrityl-D-histidine

  • Product code:FAA1055
  • CAS No.:1272755-56-2
  • Formula:C40H32ClN3O4
  • Molecular weight:654.16 g/mol

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The Clt (2-chlorotrityl) protecting group is more stable than the commonly used Trt group and is being cleaved with 90%TFA and thiol scavengers in dichloromethane. This property makes His(Clt) derivatives useful in the preparation of protected peptide fragments because the Trt-protection is in several cases not completely stable under the conditions required for the cleavage of protected peptides from 2-chlorotrityl resin.


Aletras A., Barlos K. et al; Int. J. Pept. Protein Res. 1995; 45(5): 488-496.

Barlos K. et al; Int. J. Pept. Protein Res. 1991; 38(6): 555-561.

Sarah L.M. et al, in „Fmoc Solid Phase Synthesis. A practical approach“, Ed.: Chan W.C., White P.D. Oxford University Press 2000, page 177.

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