Versatile method for the detection of covalently bound substrates on solid supports by DART mass spectrometry

Area of Science:

• Analytical Chemistry
• Organic Synthesis
• Mass Spectrometry

Background:

• Solid-phase synthesis is a cornerstone of peptide and organic molecule production.
• A significant challenge is the direct analysis of synthesized compounds on solid supports without prior cleavage.
• Current methods often require laborious cleavage steps, complicating analysis and increasing processing time.

Purpose of the Study:

• To introduce a novel method for simultaneous cleavage and analysis of solid-phase synthesized compounds.
• To demonstrate the applicability of direct analysis in real time (DART) mass spectrometry for this purpose.
• To overcome the limitations of traditional cleavage-dependent analysis in solid-phase synthesis.

Main Methods:

• Utilized direct analysis in real time (DART) mass spectrometry.
• Applied DART-MS directly to solid phase resins containing synthesized peptides and organic substrates.
• Investigated compatibility with diverse solid phase resins.

Main Results:

• Successfully demonstrated simultaneous cleavage and mass spectrometric analysis of peptides from solid supports.
• Confirmed the compatibility of the DART-MS method with a wide range of solid phase resins.
• Showcased suitability for analyzing both peptides and various organic substrates.

Conclusions:

• Direct analysis in real time mass spectrometry offers a streamlined approach for analyzing compounds directly from solid supports.
• This method eliminates the need for separate cleavage steps, simplifying solid-phase synthesis workflows.
• The technique is versatile, applicable to diverse resins and a range of molecular targets including peptides and organic substrates.