960203-41-2Relevant articles and documents
Regioselective C-H Thioarylation of Electron-Rich Arenes by Iron(III) Triflimide Catalysis
Dodds, Amy C.,Sutherland, Andrew
, p. 5922 - 5932 (2021/05/04)
A mild and regioselective method for the preparation of unsymmetrical biaryl sulfides using iron(III) catalysis is described. Activation of N-(arylthio)succinimides using the powerful Lewis acid iron(III) triflimide allowed the efficient thiolation of a range of arenes, including anisoles, phenols, acetanilides, and N-heterocycles. The method was applicable for the late-stage thiolation of tyrosine and tryptophan derivatives and was used as the key step for the synthesis of pharmaceutically relevant biaryl sulfur-containing compounds such as the antibiotic dapsone and the antidepressant vortioxetine. Kinetic studies revealed that while N-(arylthio)succinimides bearing electron-deficient arenes underwent thioarylation catalyzed entirely by iron(III) triflimide, N-(arylthio)succinimides with electron-rich arenes displayed an autocatalytic mechanism promoted by the Lewis basic product.
Robust Buchwald-Hartwig amination enabled by ball-milling
Cao, Qun,Nicholson, William I.,Jones, Andrew C.,Browne, Duncan L.
, p. 1722 - 1726 (2019/02/20)
An operationally simple mechanochemical method for the Pd catalysed Buchwald-Hartwig amination of arylhalides with secondary amines has been developed using a Pd PEPPSI catalyst system. The system is demonstrated on 30 substrates and applied in the context of a target synthesis. Furthermore, the performance of the reaction under aerobic conditions has been probed under traditional solution and mechanochemical conditions, the observations are discussed herein.
Preparation method of voltamethine
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Paragraph 0044; 0045; 0051; 0052, (2019/08/07)
The invention belongs to the technical field of organic synthesis route design and raw material medicine and intermediate preparation thereof, and particularly relates to a preparation method of voltamethine. The preparation method includes: condensing 2, bromoiodobenzene and 2,4-dimethyl phenylthiophenol to generate a first intermediate; condensing the first intermediate as well as N-phenoxycarbonyl piperazin and tert-butylalcohol to generate a second intermediate; removing a Boc protective group from N-Boc-voltamethine in the second intermediate to generate a crude voltamethine via alkalineionization; purifying the crude voltamethine to obtain the voltamethine via salt purificaton and re-alkalization ionization. The preparation method is simple in obtaining of raw materials, high in product yield and purity and is suitable for industrial production.