The first de novo synthesis of a β-C-naphthyl glycoside displaying a convenient functionality for subsequent transformations into complex C-arylglycosides is reported. The synthesis of this (±)-β-C-1,5-dibenzyloxynaphthyl 6,6,6-trifluoro-3-amino glycoside relies on a hyperbaric HDA reaction involving a new 2-vinylnaphthalenic dienophile.
据报道,β- C-萘基糖苷的首次从头合成显示出用于随后转化为复杂的C-芳基糖苷的便利功能。该(±)-β - C - 1,5-二苄氧基萘基6,6,6-三氟-3-氨基糖苷的合成依赖于高压HDA反应,该反应涉及新的2-乙烯基萘二烯。
Selective C–F Bond Allylation of Trifluoromethylalkenes
trifluoromethylalkene derivatives. By using readily available allyl metallics as nucleophilic coupling partner, the present reaction enables an expedient construction of structurally diversified CF2-bridged 1,5-dienes. Furthermore, the exquisite selectivity observed in this transformation is revealed to be based on the underlying mechanism that consists of a cascade of nucleophilic SN2′ defluorinative