924869-17-0Relevant articles and documents
Synthesis, Structure Revision, and Cytotoxicity of Nocarbenzoxazole G
Kim, Taejung,Lee, Sin-Ae,Noh, Taesub,Choi, Pilju,Choi, Seon-Jun,Song, Bong Geun,Kim, Youngseok,Park, Young-Tae,Huh, Gyuwon,Kim, Young-Joo,Ham, Jungyeob
, p. 1325 - 1330 (2019/05/04)
The total synthesis of nocarbenzoxazoles F (1) and G (2), originally obtained from the marine-derived halophilic bacterial strain Nocardiopsis lucentensis DSM 44048, was achieved via a simple and versatile route involving microwave-assisted construction of a benzoxazole skeleton, followed by carbon-carbon bond formation with the corresponding aryl bromides. Unfortunately, the 1H and 13C NMR spectra of natural nocarbenzoxazole G did not agree with those of the synthesized compound. In particular, the spectra of the isolated and synthesized compounds showed considerable differences in the signals from the protons and carbons in the aryl group. The revised structure was validated by the total synthesis of the actual nocarbenzoxazole G (8c) molecule, which is a regioisomer of the compound that was reported earlier as nocarbenzoxazole G. The synthesized derivatives showed specific cytotoxicity to the human cervical carcinoma cell line, HeLa, but did not have any remarkable effect on the other cell lines.
Novel nocarbenzoxazole derivatives, a preparation method thereof and use thereof
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Paragraph 0185-0189, (2018/01/02)
The present invention relates to a novel nocarbenzoxazole derivative which can be useful for preventing or treating cancer diseases, a method for producing the same, and a pharmaceutical composition including the same as an active ingredient. More specifically, the present invention relates to a pharmaceutical composition for preventing or treating cancer diseases, wherein the pharmaceutical composition includes a compound represented by chemical formula 1 or a pharmaceutically acceptable salt thereof as an active ingredient.COPYRIGHT KIPO 2017
Carbon dioxide as the C1 source for direct C-H functionalization of aromatic heterocycles
Vechorkin, Oleg,Hirt, Nathalie,Hu, Xile
supporting information; experimental part, p. 3567 - 3569 (2010/10/02)
(Equation Presented). A simple and straightforward method has been developed for the direct carboxylation of aromatic heterocylces such as oxazoles, thiazoles, and oxadiazoles using CO2 as the C1 source. The reactions require no metal catalyst and only Cs2CO3 as the base. A good functional group tolerance is achieved.
Synthesis of some novel 2-substituted-N-aryl-benzoxazole-5-carboxamides using cobalt dipyridine dichloride as a catalyst
Sarangapani,Sridhar,Arjun,Adharvana Chari
, p. 1187 - 1190 (2008/12/20)
(Chemical Equation Presented) An efficient synthesis of some novel 2-substituted-N-aryl-benzoxazole-5-carboxamides from 2-substituted - 5-carbomethoxy benzoxazole on treatment with different substituted anilines promoted by cobalt dipyridine dichloride as a catalyst is described. This new approach has the advantage of excellent yields (90%) and short reaction times 1-2 h.