66576-71-4Relevant academic research and scientific papers
Highly enantioselective iridium-catalyzed hydrogenation of α,β-unsaturated esters
Li, Jia-Qi,Quan, Xu,Andersson, Pher G.
supporting information, p. 10609 - 10616 (2012/11/07)
α,β-Unsaturated esters have been employed as substrates in iridium-catalyzed asymmetric hydrogenation. Full conversions and good to excellent enantioselectivities (up to 99 % ee) were obtained for a broad range of substrates with both aromatic- and aliphatic substituents on the prochiral carbon. The hydrogenated products are highly useful as building blocks in the synthesis of a variety of natural products and pharmaceuticals. Asymmetric hydrogenation: A variety of α,β-unsaturated esters were hydrogenated with high enantioselectivities (see scheme). The hydrogenated products have been used in synthetic transformations as well as in formal total syntheses. Copyright
The first examples of selective carbonylation of n-butane and n-pentane
Akhrem, Irena,Orlinkov, Alexander,Afanas'eva, Lyudmila,Petrovskii, Pavel,Vitt, Sergei
, p. 5897 - 5900 (2007/10/03)
The polyhalomethane based superelectrophilic systems allowed us to accomplish the first efficient and selective carbonylation of n-butane and n- pentane with CO. Depending on the nature of the superelectrophilic system, Me3CCOOR or EtCH(Me)COOR (R = H, Alk) can be obtained at -20°C, 1 atm from n-butane and CO after water (α alcohol) treatment in = 90% yield based on the superelectrophilic system. Pentane reacts with CO in the presence d the CBr4 · 2AlBr3 superacid to give a single product, EtC(Me)2COOR, in almost quantitative yield.
