نتایج جستجو برای: nucleophilic opening

تعداد نتایج: 54008  

Journal: :Organic & biomolecular chemistry 2015
Julian G Knight Rua B Alnoman Paul G Waddell

2-Halogeno BODIPYs undergo copper catalysed nucleophilic substitution with alkyl amines and anilines and an amide to give the corresponding 3-aminoBODIPY derivatives. The substrates are readily prepared by the regioselective 2-halogenation of the chemically robust, preformed BODIPYs thus providing an alternative to direct nucleophilic substitution of the corresponding 3-halogenoBODIPYs which re...

In the present research, behavior of SPSPs with two rectangular openings and effect of strengthening different subpanels with various stiffener arrangements is investigated. In the next step, to investigate the effect of changing opening width on the trend of degradation shear stiffness and strength of the panel, the opening width is changed. In the third step, to study the effect of changing o...

Journal: :Bulletin of the Chemical Society of Japan 2021

The synthesis of 1,1-difluoro-1-alkenes was achieved by the treatment dithioesters and thioketones with trimethylsilyl 2-fluorosulfonyl-2,2-difluoroacetate in presence a proton sponge catalyst, namely, 1,8-bis(dimethylamino)naphthalene. generated electrophilic difluorocarbene (:CF2) reacted thiocarbonyl functionalities to form 2,2-difluorothiirane intermediates, desulfurization which afforded p...

Journal: :Bulletin of the Chemical Society of Japan 1967

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