55242-83-6Relevant articles and documents
THAILANSTATIN ANALOGS
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Paragraph 0373; 0376, (2019/04/05)
The invention provides novel cytotoxic compounds and cytotoxic conjugates comprising these cytotoxic compounds and cell-binding agents. More specifically, this invention relates to novel thailanstatin A analogs, useful as cytotoxic small molecule toxins i
A 3 - isoxazole acetate acid animal pen fat chemical synthesis method
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Paragraph 0027; 0038; 0043; 0048; 0049, (2018/04/01)
The invention relates to a chemical synthesis method of 3-isoxazolyl benzyl acetate. According to the invention, chloroacetyl chloride and acetylene are taken as raw materials, the yield of the reaction is increased by addition, condensation, substitution, hydrolysis and esterification steps and an efficient synthesis method is provided for the synthesis of the compound. The synthesis method mainly comprises steps of adding acetylene, chloroacetyl chloride, catalyst aluminum chloride and a solvent tetrahydrofuran into the reaction vessel, reacting, and separating to obtain 1,4-dichloro-3-butenone after the reaction is completed; adding 1,4-dichloro-3-butenone and ammonium sulfate into a methanol or ethanol solvent, controlling the reaction temperature, and reacting to obtain 3-chloromethyl isoxazole; preparing 3-isoxazole acetonitrile; adding 3-isoxazole oxazol-acetonitrile into hydrochloric acid for hydrolyzing to obtain 3-isoxazole acetic acid; adding 3-isoxazole acetic acid and benzyl alcohol into a dichloromethane or trichloromethane solvent, and adding thionyl chloride and a catalyst N, N-dimethyl-formamide for reacting to obtain 3-isoxazolyl benzyl acetate.