Selectfluor-Mediated Dialkoxylation of Tungsten η<sup>2</sup>-Pyridinium Complexes
收藏NIAID Data Ecosystem2026-03-06 收录
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η2-coordinated pyridinium complexes of {TpW(NO)(PMe3)} undergo a stereoselective dialkoxylation reaction when treated with Selectfluor in an alcohol. The alkoxy groups add to the 5- and 6-positions in a syn fashion (proven by X-ray diffraction). When the N-acetylpyridinium complex is dialkoxylated, the resulting acyldihydropyridinium system readily undergoes nucleophilic addition with cyanide ion to stereoselectively generate a third stereocenter at C2 of the pyridine ring. Treatment with CAN decomplexes the tetrahydropyridine.
创建时间：
2009-01-26
