Diversity oriented clicking delivers β-substituted alkenyl sulfonyl fluorides as covalent human neutrophil elastase inhibitors

• Published in: Proceedings of the National Academy of Sciences - PNAS 2022-09, Vol.119 (37), p.e2208540119
• Main Authors: Cheng, Yunfei, Li, Gencheng, Smedley, Christopher J, Giel, Marie-Claire, Kitamura, Seiya, Woehl, Jordan L, Bianco, Giulia, Forli, Stefano, Homer, Joshua A, Cappiello, John R, Wolan, Dennis W, Moses, John E, Sharpless, K Barry
• Format: Article
• Language: English
• Subjects: Amines; Carboxylates; Chemical synthesis; Click Chemistry - methods; Elastase; Fluorides; Fluorides - chemical synthesis; Fluorides - chemistry; Fluorides - pharmacology; Halides; Hubs; Humans; Inhibitors; Isomers; Leukocyte Elastase - antagonists & inhibitors; Leukocytes (neutrophilic); Physical Sciences; Proteinase Inhibitory Proteins, Secretory - chemical synthesis; Proteinase Inhibitory Proteins, Secretory - chemistry; Proteinase Inhibitory Proteins, Secretory - pharmacology; Stereoselectivity; Substitutes; Sulfinic Acids - chemical synthesis; Sulfinic Acids - chemistry; Sulfinic Acids - pharmacology
• ISSN: 0027-8424; 1091-6490; 1091-6490
• DOI: 10.1073/pnas.2208540119

Diversity Oriented Clicking (DOC) is a discovery method geared toward the rapid synthesis of functional libraries. It combines the best attributes of both classical and modern click chemistries. DOC strategies center upon the chemical diversification of core "SuFExable" hubs-exemplified by 2-Substituted-Alkynyl-1-Sulfonyl Fluorides (SASFs)-enabling the modular assembly of compounds through multiple reaction pathways. We report here a range of stereoselective Michael-type addition pathways from SASF hubs including reactions with secondary amines, carboxylates, 1 -1,2,3-triazole, and halides. These high yielding conjugate addition pathways deliver unprecedented β-substituted alkenyl sulfonyl fluorides as single isomers with minimal purification, greatly enriching the repertoire of DOC and holding true to the fundamentals of modular click chemistry. Further, we demonstrate the potential for biological function - a key objective of click chemistry - of this family of SASF-derived molecules as covalent inhibitors of human neutrophil elastase.