共查询到19条相似文献,搜索用时 98 毫秒
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A novel approach for synthesizing the key dolutegravir intermediate is described via MgBr2-promoted intramolecular cyclization. Condensation of commercially available methyl oxalyl chloride and ethyl 3-(N,N-dimethylamino)acrylate afforded the vinylogous amide in an excellent yield. Subsequent substitution by aminoacetaldehyde dimethyl acetal and methyl bromoacetate gave rise to the expected precursor for cyclization, which was promoted by MgBr2 to highly selectively convert into pyridinone diester. The key dolutegravir intermediate was finally prepared by the selective hydrolysis of the corresponding diester via LiOH. 相似文献
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Srinivasachary K. Subbareddy D. Ramadas C. Balaji S. K. K. Somannavar Y. S. Ramadevi B. 《Russian Journal of Organic Chemistry》2022,58(4):526-535
Russian Journal of Organic Chemistry - An efficient, cost effective and commercially viable synthesis of dolutegravir sodium has been developed from commercially available methyl... 相似文献
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Xianheng Wang Song Chen Changkuo Zhao Liangye Long Yuhe Wang 《Journal of heterocyclic chemistry》2019,56(7):2063-2067
A convenient method was developed to prepare the diastereomer of dolutegravir tricyclic intermediate in the catalysis of EDCI/DMAP in up to 87% yield. Different solvents, temperature, and times were optimized. The synthesized diastereomer 6 ′ could be used as a standard for the industrial manufacture requirement of dolutegravir active pharmaceutical ingredient. 相似文献
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Procedures are described for the convenient generation of an iodinated carboxylic acid possessing considerable utility as a precursor to several biologically active lignans. 相似文献
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Maria Auxiliadora Fontes Prado Ricardo José Alves Alaíde Braga de Oliveira José Dias de Souza Filho 《合成通讯》2013,43(5):1015-1022
6-acetamido-6,8-dideox-1,2:3,4-di-O-isopropylidene- D -glycero-α-D-galacto-octopyranos-7-ulose (6), has been synthesised from D -galactose. The side chain elongation was carried out by cyano-amination of the protected dialdo sugar (2), followed by N-acetylation, and a subsequent Grignard reaction. 相似文献
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The first synthesis of cotarnone (2), a degradation product of cotarnine (1), was achieved from 2-hydroxy-3-methoxy-benzaldehyde (o-vanillin), and 2 can be converted to 1 by a known method. 相似文献