Niobium(v)-catalyzed defluorinative triallylation of α,α,α-trifluorotoluene derivatives by triple C-F bond activation.

Title Niobium(v)-catalyzed defluorinative triallylation of α,α,α-trifluorotoluene derivatives by triple C-F bond activation.
Authors Saito, K.; Umi, T.; Yamada, T.; Suga, T.; Akiyama, T.
Journal Org Biomol Chem
DOI 10.1039/c6ob02825j
Abstract

The catalytic defluorinative triallylation of α,α,α-trifluorotoluene derivatives via C-F bond activation has been achieved by the use of the NbCl5 catalyst and allyltrimethylsilane as a nucleophile. Several control experiments have suggested the importance of the conjugation between the fluorine atoms and the carbocation center in this reaction.

Citation Saito, K.; Umi, T.; Yamada, T.; Suga, T.; Akiyama, T..Niobium(v)-catalyzed defluorinative triallylation of α,α,α-trifluorotoluene derivatives by triple C-F bond activation..

Related Elements

Niobium

41 Nb 92.906380000 Niobium

See more Niobium products. Niobium (atomic symbol: Nb, atomic number: 41) is a Block D, Group 5, Period 5 element with an atomic weight of 92.90638. Niobium Bohr ModelThe number of electrons in each of niobium's shells is 2, 8, 18, 12, 1 and its electron configuration is [Kr] 4d4 5s1. The niobium atom has a radius of 146 pm and a Van der Waals radius of 207 pm. Niobium was discovered by Charles Hatchett in 1801 and first isolated by Christian Wilhelm Blomstrand in 1864. In its elemental form, niobium has a gray metallic appearance. Niobium has the largest magnetic penetration depth of any element and is one of three elemental type-II superconductors (Elemental Niobiumalong with vanadium and technetium). Niobium is found in the minerals pyrochlore, its main commercial source, and columbite. The word Niobium originates from Niobe, daughter of mythical Greek king Tantalus.

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