152706-23-5Relevant academic research and scientific papers
COVALENT RAS INHIBITORS AND USES THEREOF
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Page/Page column 272-273, (2021/06/04)
The disclosure features compounds, or pharmaceutically acceptable salts thereof, alone and in combination with other therapeutic agents, pharmaceutical compositions, and protein conjugates thereof, capable of modulating biological processes including Ras, and their uses in the treatment of cancers.
Straightforward synthesis and antioxidant studies of chalcogenoaziridines
Borges, Rodrigo,Andrade, Floyd C.D.,Schwab, Ricardo S.,Sousa, Fernanda S.S.,de Souza, Maurice Neto,Savegnago, Lucielli,Schneider, Paulo H.
supporting information, p. 3501 - 3504 (2016/07/15)
Herein we reported the synthesis of chalcogenoaziridines through the introduction of the organoselenium moiety in the aziridine framework through the nucleophilic substitution of the OTs leaving group. In addition, the antioxidant activity, as reflected b
N-Trityl-aziridinyl alcohols as highly efficient chiral catalysts in asymmetric additions of organozinc species to aldehydes
Jarzyski, Szymon,Lesniak, Stanislaw,Pieczonka, Adam M.,Rachwalski, Michal
, p. 35 - 40 (2015/03/03)
A synthetic route leading to a series of new chiral catalysts containing the N-trityl-aziridine moiety and a primary and a secondary hydroxyl group as nucleophilic centers is described. All the new compounds have been tested as chiral catalysts in the enantioselective addition of diethylzinc and phenylethynylzinc to aryl and alkyl aldehydes, yielding the corresponding chiral alcohols in high chemical yields (up to 96%) and with excellent ee's of ca. 90%. The influence of the stereogenic centers located at the carbon atom bonded with the hydroxyl moiety and on the carbon of the aziridine ring on the stereochemistry of the addition reactions is also discussed.
Synthesis of enantiopure 3-substituted morpholines
Bornholdt, Jan,Felding, Jakob,Kristensen, Jesper Langgaard
scheme or table, p. 7454 - 7457 (2011/01/04)
Enantiopure 3-substituted morpholines were assembled through ring-opening of a N-2-benzothiazolesulfonyl (Bts) activated aziridine with organocuprates followed by a ring annulation reaction with a vinylsulfonium salt under microwave conditions. Deprotecti
Asymmetrie total syntheses of (-)-renieramycin M and G and (-)-jorumycin using aziridine as a lynchpin
Wu, Yan-Chao,Zhu, Jieping
supporting information; experimental part, p. 5558 - 5561 (2010/02/28)
"Chemical Equation Presented" By exploring the triple reactivity of two aziridines and double nucleophilicity of two aromatics, convergent and versatile syntheses of the above four natural products were developed.
Selectively N-protected enantiopure 2,5-disubstituted piperazines: Avoiding the pitfalls in solid-phase Fukuyama-Mitsunobu cyclizations
Ottesen, Lars K.,Olsen, Christian A.,Witt, Matthias,Jaroszewski, Jerzy W.,Franzyk, Henrik
experimental part, p. 2966 - 2978 (2009/12/24)
An efficient solid-phase route to ring-substituted piperazines from O-linked resin-bound (S)-aziridine-2-methanol is described. Regioselective microwave-assisted aminolysis followed by intramolecular FukuyamaMitsunobu cyclization constitute the key features of the protocol. Simple piperazines and diazepanes were readily obtained without preceding N-protection of the acyclic intermediate, whereas attempts to extend this protocol to chiral 2,5-disubstituted piperazines failed. Modifications encompassing N-carbamoylation prior to ring-closure were therefore investigated. However, standard carbamoylating agents, for example, Fmoc-Cl and Alloc-Cl tended to give bis-protected by-products. Thus, novel microwave-assisted solid-phase N-protection procedures were developed for efficient introduction of Fmoc, Boc and Alloc groups. The subsequent cyclization proceeded in moderate to excellent yields depending on the bulk of the side chain and type of N-protecting group. This protocol readily provided novel cis- and trans-2,5-disubstituted piperazines displaying a variety of N-protecting group patterns after further on-resin manipulations. Also, unexpected by-products obtained during these optimization studies were identified and characterized. This includes nosylated ureas arising from an alternative cyclization pathway. Finally, post-cleavage oxidation gave access to the Fmoc/Boc-protected a-amino acid as well as the corresponding aldehyde. The chiral piperazines described in this work will enable construction of combinatorial libraries with a higher chemical diversity compared to those containing simple N.N′-difunctionalized piperazines, often present in drug-like compounds.
An enantiospecific approach to triazolylalanine derivatives
Jamookeeah, Clare E.,Beadle, Christopher D.,Harrity, Joseph P. A.
scheme or table, p. 133 - 137 (2009/06/18)
An efficient and practical route to an enantiomerically pure aziridinylmethyl azide is described that can be transformed to the corresponding triazole by a copper-catalysed [3+2] alkyne cycloaddition reaction. The transformation of these intermediates int
First synthesis of N-[(aziridin-2-yl)methyl]benzimidazolequinone and analysis of toxicity towards normal and Fanconi anemia cells
O'Donovan, Liz,Carty, Michael P.,Aldabbagh, Fawaz
scheme or table, p. 5592 - 5594 (2009/04/13)
A diazole is N-substituted with 1-trityl-2-methylaziridine and demethylated and oxidised with NBS under acidic conditions to give a benzimidazolequinone; this novel anti-tumour agent is marginally more cytotoxic than mitomycin C (MMC) towards the normal h
Preparation of alkyl-substituted indoles in the benzene portion. Part 9. Synthesis of (1aS,8bS)-1-tert-butyloxycarbonyl-8-formyl-1,1a,2,8b-tetrahydroazirino [2',3':3,4]pyrrolo[1,2-a]indole. Model study for the enantiospecific synthesis of ziridinomitosenes
Utsunomiya,Fuji,Sato,Natsume
, p. 854 - 860 (2007/10/02)
Effective pathways for an enantiospecific synthesis of (1aS,8bS)-1-tert-butyloxycarbonyl-8-formyl-1,1a,2,8b-tetrahydroazirino [2',3':3,4]pyrrolo[1,2-a]indole (8) were investigated as a preliminary experiment aiming at chiral syntheses of aziridinomitosenes 5 and (1aS,8bS)-8-[[(aminocarbonyl)oxy]methyl]-5-formyl-7-hydroxy-1,1a,2,8b- tetrahydroazirino[2',3':3,4]pyrrolo[1,2-a]indole (6a). An aldehyde 14, derived from L-serine was condensed with 2-lithio-1-(phenylsulfonyl)indole (10) to afford diastereomers 15a and 15b, whose stereochemistry was unambiguously determined by 1H-NMR studies of the 1,3-dioxane derivatives 17a, 17b, and 18 as well as the X-ray crystallographic analysis of a dihydropyrrolo[1,2-a]indole derivative 31a. The latter compound was prepared from 15a via the following operations (Chart 5): (i) removal of the acetonide and the indole-protecting groups, followed by acetylation to form 29a, (ii) Vilsmeier reaction to produce 30a, and (iii) hydrolysis of acetyl groups, partial methanesulfonylation (mesylation), and treatment with potassium carbonate in acetonitrile. A diastereomer 31b was obtained from 15b in a similar manner. Both isomers 31a and 31b afforded the desired compound 8 upon treatment with a mesylation reagent followed by potassium tert-butoxide in tetrahydrofuran.
