Lower-rim Cinchona anchored calix[4]arene cationic catalysts were developed for asymmetric Michael addition of acetylacetone to β-nitrostyrenes. The desired Michael adducts formed with high yields and enantioselectivities. Density functional theory investigations...
The reactivity of tris(ortho-carboranyl)borane with ubiquitous Lewis bases reveals only small Lewis bases bind. The tremendous bulk and Lewis acidity is leveraged in frustrated Lewis pair Si-H cleavage with a...
A statistical study on C, H, N elemental analysis for 5 small organic compounds at 18 independent service providers across multiple countries demonstrates variation in the returned results that is outside journal guidelines (0.4%) in greater than 10% of measurements for C and N while H analyses return a high proportion of results within guidelines. The results clearly indicate that a deviation of 0.4% is not a realistic journal requirement for synthetic samples with the variability attributed to random error in the data collection process.
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