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Wang F, Shi X, Zhang Y, Zhou W, Li A, Liu Y, Sessler JL, He Q. Reversible Macrocycle-to-Macrocycle Interconversion Driven by Solvent Selection. J Am Chem Soc 2023; 145:10943-10947. [PMID: 37172073 DOI: 10.1021/jacs.3c01066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Macrocycle-to-macrocycle interconversions are of interest because they can allow access to a variety of structures. However, reversible interconversion between different sized macrocycles remains challenging to control. Herein, we report a facile one-pot synthesis of a series of self-assembled macrocycles from readily prepared α,α'-linked oligopyrrolic dialdehydes and various alkyl diamines. The condensation of pyridine-bridged oligopyrrolic dialdehyde 3 and simple alkyl diamines proved independent of solvent, always yielding the [2 + 2] macrocyclic products. However, when 3 was condensed with 2,2'-oxybis(ethylamine) 14, either ([1 + 1] or [2 + 2]) products are obtained depending on the choice of solvent. Reaction of 3 and 14 in methanol, ethanol, or chloroform gave the [1 + 1] macrocycle as the sole product. In contrast, condensation of 3 and 14 in dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF), or acetonitrile (MeCN) yielded the [2 + 2] macrocycle as the major product in the form of a precipitate. Reversible interconversion between the [1 + 1] and [2 + 2] macrocycles could be achieved by tuning the solvent, with the ratio driven by thermodynamic and solubility considerations.
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Affiliation(s)
- Fei Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Xiangling Shi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Yi Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Wei Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Aimin Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Yuanchu Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Jonathan L Sessler
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Qing He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
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LaPlante SR, Nar H, Lemke CT, Jakalian A, Aubry N, Kawai SH. Ligand bioactive conformation plays a critical role in the design of drugs that target the hepatitis C virus NS3 protease. J Med Chem 2013; 57:1777-89. [PMID: 24144444 DOI: 10.1021/jm401338c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A ligand-focused strategy employed NMR, X-ray, modeling, and medicinal chemistry to expose the critical role that bioactive conformation played in the design of a variety of drugs that target the HCV protease. The bioactive conformation (bound states) were determined for key inhibitors identified along our drug discovery pathway from the hit to clinical compounds. All adopt similar bioactive conformations for the common core derived from the hit peptide DDIVPC. A carefully designed SAR analysis, based on the advanced inhibitor 1 in which the P1 to P3 side chains and the N-terminal Boc were sequentially truncated, revealed a correlation between affinity and the relative predominance of the bioactive conformation in the free state. Interestingly, synergistic conformation effects on potency were also noted. Comparisons with clinical and recently marketed drugs from the pharmaceutical industry showed that all have the same core and similar bioactive conformations. This suggested that the variety of appendages discovered for these compounds also properly satisfy the bioactive conformation requirements and allowed for a large variety of HCV protease drug candidates to be designed.
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Affiliation(s)
- Steven R LaPlante
- Department of Chemistry, Boehringer-Ingelheim (Canada) Ltd., Research and Development , Laval, Québec H7S 2G5, Canada
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The effect of the P1 side chain on the binding of optimized carboxylate and activated carbonyl inhibitors of the hepatitis C virus NS3 protease. Future Med Chem 2010; 2:1073-81. [DOI: 10.4155/fmc.10.198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Peptidyl inhibitors of the hepatitis C virus NS3 protease hold much promise as direct-acting antiviral agents against hepatitis C infection. The optimization of N-terminal cleavage products, found to exhibit activity (product inhibition) against the enzyme, has led to potent tripeptide inhibitors that bear free C-terminal carboxylate groups. An analogous activated carbonyl compound (pentafluoroethyl ketone) bearing a P1 norvaline (Nva) was found to possess comparable activity against hepatitis C virus protease. However, an analogue bearing an aminocyclopropylcarboxylic acid (Acca) P1 residue exhibited very poor activity. 19F-NMR studies indicate that the propensity of the Acca-derived activated carbonyl to form hemiketals is only slightly reduced compared with that of a P1 Nva equivalent. These results, as well as molecular modeling studies, argue against steric hindrance of the nucleophilic attack of Ser-139 accounting for the poor mechanism-based inhibition by the former. We hypothesize that the conformational properties of the respective C-termini in the context of an adaptable active site account for the divergent P1 structure–activity relationships.
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