Orthogonal Protection
Orthogonal Protection — A strategy using protecting groups that are removed by different mechanisms, allowing selective deprotection of specific functional groups during peptide synthesis.
What Is Orthogonal Protection?
Orthogonal protection uses protecting groups that are removed by completely different chemical mechanisms, allowing selective deprotection of one group while others remain intact. Orthogonality is essential for synthesizing complex peptides with multiple disulfides, branched structures, or site-specific modifications.
Orthogonal Pairs
- Fmoc/tBu: Standard SPPS orthogonality. Fmoc removed by base; tBu/Boc by acid
- Cys protecting: Trt (TFA), Acm (I2 or Hg), StBu (thiol) for regioselective disulfide formation
- Alloc/Dde: Removed by Pd(0) and hydrazine respectively, orthogonal to Fmoc and tBu
Frequently Asked Questions
What is Orthogonal Protection?
A strategy using protecting groups that are removed by different mechanisms, allowing selective deprotection of specific functional groups during peptide synthesis.
Why is Orthogonal Protection important in peptide research?
Orthogonal Protection is a fundamental concept in synthesis as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.
Authority Sources
- Orthogonal Protection on Wikipedia
- Search Orthogonal Protection on PubChem (NIH)
- Research articles on ScienceDirect