WebDec 15, 2011 · Three-in-one: The nickel-catalyzed asymmetric three-component coupling of 1,3-dienes, aldehydes, and a silylborane in the presence of a chiral phosphoroamidite ligand has been realized. The reaction proceeds by σ-bond metathesis of an oxanickelacycle intermediate with the silylborane to afford the corresponding α-chiral … WebThe reaction scope of these silacycles was extended to a practical method for the enantioselective synthesis of tertiary carbinamines based on the addition of this chiral allylsilane reagent to a structurally diverse array of ketone-derived benzoylhydrazones (Scheme 3). 4 While many methods for the synthesis of quaternary α-amino acids have …
Copper-Catalyzed Enantioselective Borylative Allyl–Allyl Coupling …
WebOct 1, 2009 · Distribution of these products can be controlled by the fine optimization of the catalyst. In that case, the process will be asymmetric transformation controlled by the chiral catalyst even when racemic allylsilanes are used. 3 1 Scheme Generation of four possible isomers from chiral allylsilane. WebChiral N-acylhydrazones derived from commercially available 4-benzyl-2-oxazolidinone provide a rigid, conformationally restricted template to impart facial selectivity in additions … crypto handelsplatformen
Intermolecular reacitons of N-alkoxycarbonyliminium ions with ...
WebOct 7, 1999 · A spectroscopic (1H, 13C, and 119Sn NMR) study of the reaction of chiral allylsilane 1 with SnCl4 is described. We have found that the ligand exchange between … WebMay 30, 2006 · A chiral titanium complex derived from BINOL and Ti(O-i-Pr)4 catalyzes the Diels-Alder reaction of 2-bromoacrolein and cyclopentadiene with 97:3 enantioselectivity. Web15. 李灿 中国 中国科学院 中国科学院院士 Allylsilane Reagent-Controlled Divergent Asymmetric Catalytic Reactions of 2-Naphthoquinone-1-methid.. 16. 冯小明 中国 四川大学 中国科学院院士 Chiral Fe(ii) complex catalyzed enantioselective [1,3] O-to-C rearrangement of alkyl vinyl ethers an.. 17. crypto handelsplatz