Catalytic and Stoichiometric Cumulene Formation within Dimeric Group 2 Acetylides
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https://figshare.com/articles/dataset/Catalytic_and_Stoichiometric_Cumulene_Formation_within_Dimeric_Group_2_Acetylides/2379388
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资源简介：
A series
of β-diketiminate-supported magnesium and calcium
acetylide complexes have been
synthesized by σ-bond metathesis of magnesium n-butyl or magnesium and calcium amido precursors and a range of terminal
acetylenes. The dimeric complexes have been characterized by NMR spectroscopy
and X-ray diffraction analysis. The homoleptic bis(amido) and dialkyl
complexes [M{X(SiMe3)2}2(THF)2] (M = Ca, Sr; X = N, CH) have been assessed for the atom-efficient,
catalytic head-to-head dimerization of donor-functionalized terminal
alkynes into butatrienes and aryl-/silyl-substituted terminal acetylenes
into 1,3-enynes. Deuterium labeling studies of the catalytic reactions
are suggested to imply that triene formation requires concerted proton
delivery and rearrangement via an adjacent methylene group at a bimetallic
alkaline-earth species.
创建时间：
2016-02-18
