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Wiedemann EN, Mandl FA, Blank ID, Ochsenfeld C, Ofial AR, Sieber SA. Kinetic and Theoretical Studies of Beta-Lactone Reactivity-A Quantitative Scale for Biological Application. Chempluschem 2015; 80:1673-1679. [PMID: 31973367 DOI: 10.1002/cplu.201500246] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Indexed: 11/08/2022]
Abstract
Natural products comprise a rich source for bioactive molecules with medicinal relevance. Many of these contain electrophilic scaffolds that bind conserved enzyme active sites covalently. Prominent examples include beta-lactams and beta-lactones, which specifically acylate serine residues in diverse peptidases. Although these scaffolds appear similar, their bioactivities and corresponding protein targets vary. To quantify and dissect these differences in bioactivities, the kinetics of the reactions of beta-butyrolactone with a set of reference amines in buffered aqueous solution at 37 °C have been analyzed. Different product ratios of C1 versus C3 attack on the beta-butyrolactone have been observed, depending on the aliphatic or aromatic nature of the standard amine used. Quantum mechanics/molecular mechanics (QM/MM) calculations reveal that a H3 O+ molecule has a crucial role in stabilizing C3 attack by aniline, through coordination of the lactone ring oxygen. In agreement with their weak proteome reactivity, monocyclic beta-lactams did not react with the set of standard nucleophiles studied herein. Bicyclic beta-lactams, however, exhibited a lower activation barrier, and thus, reacted with standard nucleophiles. This study represents a starting point for semiquantitative reactivity scales for natural products, which, in analogy to chemical reactivity scales, will provide predictions for electrophilic modifications in biological systems.
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Affiliation(s)
- Elija N Wiedemann
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
| | - Franziska A Mandl
- Center for Integrated Protein Science CIPSM, Institute of Advanced Studies IAS, Department Chemie, Lehrstuhl für Organische Chemie II, Technische Universität München, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Iris D Blank
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
| | - Christian Ochsenfeld
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
| | - Armin R Ofial
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
| | - Stephan A Sieber
- Center for Integrated Protein Science CIPSM, Institute of Advanced Studies IAS, Department Chemie, Lehrstuhl für Organische Chemie II, Technische Universität München, Lichtenbergstrasse 4, 85748, Garching, Germany
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Mengozzi L, Gualandi A, Cozzi PG. A highly enantioselective acyl-Mannich reaction of isoquinolines with aldehydes promoted by proline derivatives: an approach to 13-alkyl-tetrahydroprotoberberine alkaloids. Chem Sci 2014. [DOI: 10.1039/c4sc01221f] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Bobbitt JM, Bartelson AL, Bailey WF, Hamlin TA, Kelly CB. Oxoammonium Salt Oxidations of Alcohols in the Presence of Pyridine Bases. J Org Chem 2014; 79:1055-67. [DOI: 10.1021/jo402519m] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James M. Bobbitt
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Ashley L. Bartelson
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
- Department
of Chemistry, Seton Hill University, 1 Seton Hill Drive, Greensburg, Pennsylvania 15601, United States
| | - William F. Bailey
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Trevor A. Hamlin
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Christopher B. Kelly
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
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Asahara H, Kida T, Iwamoto T, Hinoue T, Akashi M. Kinetic resolution of primary amines via enantioselective N-acylation with acyl chlorides in the presence of supramolecular cyclodextrin nanocapsules. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.097] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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