134833-83-3Relevant academic research and scientific papers
A novel synthesis of juncusol
Jacobi,Zheng
, p. 1279 - 1282 (1991)
Juncusol (7) has been prepared by a novel electrocyclization process beginning with the known β-tetralone derivative 9.
Enantioselective synthesis and profiling of two novel diazabicyclooctanone β-lactamase inhibitors
Xiong, Hui,Chen, Brendan,Durand-Rville, Thomas F.,Joubran, Camil,Alelyunas, Yun W.,Wu, Dedong,Huynh, Hoan
, p. 1143 - 1147 (2014)
The enantioselective synthesis of two novel cyclopropane-fused diazabicyclooctanones is reported here. Starting from butadiene monoxide, the key enone intermediate 7 was prepared in six steps. Subsequent stereoselective introduction of the cyclopropane group and further transformation led to compounds 1a and 1b as their corresponding sodium salt. The great disparity regarding their hydrolytic stability was rationalized by the steric interaction between the cyclopropyl methylene and urea carbonyl. These two novel β-lactamase inhibitors were active against class A, C, and D enzymes.
Discovery of an Orally Available Diazabicyclooctane Inhibitor (ETX0282) of Class A, C, and D Serine β-Lactamases
Durand-Réville, Thomas F.,Comita-Prevoir, Janelle,Zhang, Jing,Wu, Xiaoyun,May-Dracka, Tricia L.,Romero, Jan Antoinette C.,Wu, Frank,Chen, April,Shapiro, Adam B.,Carter, Nicole M.,McLeod, Sarah M.,Giacobbe, Robert A.,Verheijen, Jeroen C.,Lahiri, Sushmita D.,Sacco, Michael D.,Chen, Yu,O'Donnell, John P.,Miller, Alita A.,Mueller, John P.,Tommasi, Rubén A.
, p. 12511 - 12525 (2020)
Multidrug resistant Gram-negative bacterial infections are an increasing public health threat due to rapidly rising resistance toward β-lactam antibiotics. The hydrolytic enzymes called β-lactamases are responsible for a large proportion of the resistance phenotype. β-Lactamase inhibitors (BLIs) can be administered in combination with β-lactam antibiotics to negate the action of the β-lactamases, thereby restoring activity of the β-lactam. Newly developed BLIs offer some advantage over older BLIs in terms of enzymatic spectrum but are limited to the intravenous route of administration. Reported here is a novel, orally bioavailable diazabicyclooctane (DBO) β-lactamase inhibitor. This new DBO, ETX1317, contains an endocyclic carbon-carbon double bond and a fluoroacetate activating group and exhibits broad spectrum activity against class A, C, and D serine β-lactamases. The ester prodrug of ETX1317, ETX0282, is orally bioavailable and, in combination with cefpodoxime proxetil, is currently in development as an oral therapy for multidrug resistant and carbapenem-resistant Enterobacterales infections.
Asymmetric synthesis of the allocolchicinoid natural product N-acetylcolchinol methyl ether (suhailamine), solid state and solution phase conformational analysis
Davies, Stephen G.,Fletcher, Ai M.,Roberts, Paul M.,Thomson, James E.,Yeung, Angus
, (2019/11/13)
An asymmetric synthesis of the allocolchicinoid N-acetylcolchinol methyl ether (NCME) from 3-methoxybenzaldehyde is reported. Comparison of 1H and 13C NMR spectroscopic data obtained for this sample of NCME provide further evidence f
BETA-LACTAMASE INHIBITOR COMPOUNDS
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Page/Page column 71, (2018/04/13)
The present invention is directed to compounds which are beta-lactamase inhibitors. The compounds and their pharmaceutically acceptable salts are useful in combination with beta- lactam antibiotics, for the treatment of bacterial infections, including infections caused by drug resistant organisms, including multi-drug resistant organisms. The present invention includes compounds according to Formula (I): or a pharmaceutically acceptable salt thereof, wherein the values of R1, R2, R3, R4, R5 and R6 are described herein.
Features of Auxiliaries That Enable Native Chemical Ligation beyond Glycine and Cleavage via Radical Fragmentation
Loibl, Simon F.,Dallmann, Andre,Hennig, Kathleen,Juds, Carmen,Seitz, Oliver
, p. 3623 - 3633 (2018/02/16)
Native chemical ligation (NCL) is an invaluable tool in the total chemical synthesis of proteins. Ligation auxiliaries overcome the requirement for cysteine. However, the reported auxiliaries remained limited to glycine-containing ligation sites and the acidic conditions applied for cleavage of the typically applied N-benzyl-type linkages promote side reactions. With the aim to improve upon both ligation and cleavage, we systematically investigated alternative ligation scaffolds that challenge the N-benzyl dogma. The study revealed that auxiliary-mediated peptide couplings are fastest when the ligation proceeds via 5-membered rather than 6-membered rings. Substituents in α-position of the amine shall be avoided. We observed, perhaps surprisingly, that additional β-substituents accelerated the ligation conferred by the β-mercaptoethyl scaffold. We also describe a potentially general means to remove ligation auxiliaries by treatment with an aqueous solution of triscarboxyethylphosphine (TCEP) and morpholine at pH 8.5. NMR analysis of a 13C-labeled auxiliary showed that cleavage most likely proceeds through a radical-triggered oxidative fragmentation. High ligation rates provided by β-substituted 2-mercaptoethyl scaffolds, their facile introduction as well as the mildness of the cleavage reaction are attractive features for protein synthesis beyond cysteine and glycine ligation sites.
Enantioselective Spirocyclopropanation of para-Quinone Methides Using Ammonium Ylides
Roiser, Lukas,Waser, Mario
supporting information, p. 2338 - 2341 (2017/05/12)
The use of Cinchona alkaloid-based chiral ammonium ylides allows for the first highly enantioselective and broadly applicable spirocyclopropanation reactions of para-quinone methides. This strategy provides a straightforward protocol toward the chiral spiro[2.5]octa-4,7-dien-6-one skeleton, which is a frequently found structural motif in important biologically active molecules.
CERAMIDE GALACTOSYLTRANSFERASE INHIBITORS FOR THE TREATMENT OF DISEASE
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Paragraph 000367, (2018/01/17)
Described herein are compounds, methods of making such compounds, pharmaceutical compositions and medicaments containing such compounds, and methods of using such compounds to treat or prevent diseases or disorders associated with the enzyme ceramide galactosyltransferase (CGT), such as, for example, lysosomal storage diseases. Examples of lysosomal storage diseases include, for example, Krabbe disease and Metachromatic Leukodystrophy.
NRF2 REGULATORS
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Page/Page column 124, (2017/01/02)
Provided are aryl analogs,pharmaceutical compositions containing them and their use as NRF2 regulators.
Highly stereoselective cyclopropanation of diazo Weinreb amides catalyzed by chiral Ru(II)-: Amm -Pheox complexes
Chanthamath, Soda,Mandour, Hamada S. A.,Tong, Thu Minh Thi,Shibatomi, Kazutaka,Iwasa, Seiji
supporting information, p. 7814 - 7817 (2016/07/06)
The first highly stereoselective cyclopropanation of diazo Weinreb amides with olefins was accomplished using chiral Ru(ii)-Amm-Pheox complex 7a to give the corresponding chiral cyclopropyl Weinreb amides in high yields (up to 99%) with excellent diastereoselectivities (up to 99:1 dr) and enantioselectivities (up to 96% ee).
