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Related Experiment Video

Updated: Jul 11, 2026

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Fast conventional Fmoc solid-phase peptide synthesis with HCTU.

Christina A Hood1, German Fuentes, Hirendra Patel

  • 1Department of Chemistry, Protein Technologies Inc., Tucson, Arizona, 4675 South Coach Drive, Tucson, Arizona 85714, USA.

Journal of Peptide Science : an Official Publication of the European Peptide Society
|September 25, 2007
PubMed
Summary

1H-Benzotriazolium 1-[bis(dimethyl-amino)methylene]-5-chloro-hexafluorophosphate (HCTU) is a safe and affordable peptide synthesis reagent. It significantly reduces reaction times for synthesizing biologically active peptides, improving efficiency without compromising purity.

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Area of Science:

  • Organic Chemistry
  • Medicinal Chemistry
  • Biochemistry

Background:

  • Solid-phase peptide synthesis (SPPS) is crucial for producing peptides.
  • Efficient coupling reagents are essential for rapid and high-purity peptide synthesis.
  • Existing reagents can be expensive or require specialized techniques.

Purpose of the Study:

  • To evaluate 1H-Benzotriazolium 1-[bis(dimethyl-amino)methylene]-5-chloro-hexafluorophosphate (HCTU) as a coupling reagent in Fmoc SPPS.
  • To determine if HCTU can accelerate peptide synthesis without affecting purity.
  • To assess the cost-effectiveness and practicality of HCTU.

Main Methods:

  • Utilized HCTU as the coupling reagent for the synthesis of seven biologically active peptides.
  • Employed standard Fmoc SPPS protocols.

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  • Measured reaction times for deprotection and coupling steps.

    • Main Results:

    • Achieved significantly reduced reaction times: deprotection in ≤3 min and coupling in ≤5 min.
    • Synthesized peptides including GHRP-6, (65-74)ACP, oxytocin, G-LHRH, C-peptide, hAmylin(1-37), and beta-amyloid(1-42).
    • Demonstrated substantial reductions in total synthesis time, up to 42.5 hours, with no loss in crude peptide purity.

    Conclusions:

    • HCTU is a non-toxic, non-irritating, and non-corrosive coupling reagent.
    • HCTU enables rapid and efficient Fmoc solid-phase peptide synthesis.
    • HCTU offers an affordable alternative for accelerated peptide production without compromising quality.