Exhaustive Suzuki–Miyaura reactions of polyhalogenated heteroarenes with alkyl boronic pinacol esters
作者:Sébastien Laulhé、J. Miles Blackburn、Jennifer L. Roizen
DOI:10.1039/c7cc00997f
日期:——
A novel Suzuki–Miyaura protocol is described that enables the exhaustive alkylation of polychlorinated pyridines. This method facilitates a formal synthesis of normuscopyridine and the rapid assembly of a dumbbell shaped portion of a [2]rotaxane.
In the presence of a Cu/DiPPAM catalytic system, various diorganozincreagents realize 1,6-asymmetric conjugate addition on various cyclic five- and six-membered cyclic dienones, with complete regioselectivity and high ee’s (93−99%).
The fatty acid synthesis inhibitor cerulenin and the structurally unrelated Golgi transport inhibitor brefeldin A are substrates for both types of efflux pumps in Candida albicans. In an effort to overcome efflux pump‐mediated drug resistance in Candida albicans, ceruleninanalogues were generated using a variety of synthesis pathways. The so obtained cerulenin derivatives were tested on multidrug‐resistant
A highly convergent and short synthesis of trans-(+)-laurediol is presented. The synthesis features a highly efficient construction of a cis-3-hydroxy-γ-butyrolactone through a Sharpless AD reaction of a β,γ-unsaturated ester.
Two types of ionicliquids (ILs), 1-(3-hexenyl)-3-methyl imidazoliumiodide and 1-(3-butenyl)-3-methyl imidazoliumiodide, are synthesized by introducing an unsaturated bond into the side alkyl chain of the imidazolium cation. These new ionicliquids exhibit high thermal stability and low viscosity (104 cP and 80 cP, respectively). The molecular dynamics simulation shows that the double bond introduced