4720-66-5Relevant articles and documents
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Weiss,Appel
, p. 2269 (1949)
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Synthesis and evaluation of quinoxaline derivatives as potential influenza NS1A protein inhibitors
You, Lei,Cho, Eun Jeong,Leavitt, John,Ma, Li-Chung,Montelione, Gaetano T.,Anslyn, Eric V.,Krug, Robert M.,Ellington, Andrew,Robertus, Jon D.
, p. 3007 - 3011 (2011/06/24)
A library of quinoxaline derivatives were prepared to target non-structural protein 1 of influenza A (NS1A) as a means to develop anti-influenza drug leads. An in vitro fluorescence polarization assay demonstrated that these compounds disrupted the dsRNA-NS1A interaction to varying extents. Changes of substituent at positions 2, 3 and 6 on the quinoxaline ring led to variance in responses. The most active compounds (35 and 44) had IC50 values in the range of low micromolar concentration without exhibiting significant dsRNA intercalation. Compound 44 was able to inhibit influenza A/Udorn/72 virus growth.
Photogeneration of amines from α-keto carbamates: Design and preparation of photoactive compounds
Cameron, James F.,Willson, C. Grant,Frechet, Jean M. J.
, p. 2429 - 2442 (2007/10/03)
The design and synthesis of substituted desyl (2-oxo-1,2-diphenylethyl) groups has been investigated to create new photolabile protecting groups. The photoreactivity of these chromophores stems from the diverse photochemistry of the desyl group. Several chromophore designs have been explored in which the substitution pattern of the parent desyl chromophore was varied systematically. The required benzoin chromophores are prepared by a variety of synthetic routes, depending on the structure of the benzoin chromophore desired. Symmetrical benzoins are readily available via the benzoin condensation. Unsymmetrical benzoins including 2,2-disubstituted α-hydroxy ketones are generally prepared via trimethylsilyl (TMS) masked cyanohydrins. On reaction with a Grignard reagent, the TMS masked cyanohydrin functions as an α-hydroxycarbonyl equivalent to form α-hydroxy ketones. Alternatively, lithiation of a TMS masked cyanohydrin generates a benzoyl anion equivalent which reacts with aldehydes and ketones to generate substituted benzoins. These desyl chromophores have significant potential as new photolabile protecting moieties for a variety of functional groups and are used to mask primary and secondary amines as photosensitive α-keto carbamates. The substituted benzoin carbamates are readily prepared from the appropriate benzoin by reaction with isocyanates or by activation as a mixed carbonate followed by reaction with the free amine. These α-keto carbamates are interesting for two main reasons. First, the facile synthesis of these materials indicates the ease of introduction of the desyl based photolabile group. Second, these α-keto carbamates may be used for rapid evaluation of novel photoactive desyl based chromophores.
