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- W2065367057 abstract "Bicalutamide, a therapeutically important anti-androgen used in the treatment of hormone-sensitive cancers, may be synthesised from the appropriate halohydrin or epoxide. We report here studies aimed at demonstrating unambiguously that preparation of bicalutamide and its thioether analogue from the chlorohydrin under basic conditions proceeds via opening of an intermediate epoxide by the appropriate sulfinate or thiolate nucleophile, that the analogous anionic sulfur nucleophiles react under the same conditions and that the SN2 pathway involving direct displacement of chloride by the nucleophile does not operate. The proposed mechanism is confirmed by the quantitative fitting of sequential reaction kinetics, taking into account the competing dimerisation of the thiolate nucleophile that occurs under basic conditions. The O-methyl analogue of the chlorohydrin is unreactive towards thiolate under the same conditions, although a slower cyclisation to the β-lactam was observed. The implications of these observations for the analogous preparation of thioethers and sulfones are discussed." @default.
- W2065367057 created "2016-06-24" @default.
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- W2065367057 date "2009-01-01" @default.
- W2065367057 modified "2023-09-27" @default.
- W2065367057 title "Mechanistic studies on the synthesis of bicalutamide" @default.
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- W2065367057 doi "https://doi.org/10.1039/b815894k" @default.
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