https://www.selleckchem.com/products/gdc-0068.html Retraction of 'Chemical synthesis and antigenic activity of a phosphatidylinositol mannoside epitope from Mycobacterium tuberculosis' by Shi-Yuan Zhao et al., Chem. Commun., 2020, 56, 14067-14070, DOI 10.1039/D0CC05573E.Rh(iii)-catalyzed allylic C-H amidation of substituted alkenes with in situ generated iminoiodinanes is demonstrated. The presented protocol is compatible with differently functionalized unactivated terminal alkenes and internal alkenes. In terminal alkenes, branch selectivity was observed exclusively. Based on the detailed mechanistic investigation, a possible reaction mechanism involving the in situ generated π-allyl as well as metal-nitrene intermediates has been proposed.The first examples of scandium methylidyne complexes [(Cp*)Sc(μ2-X)]3(μ3-CH) (Cp* = C5Me5; X = Br, Me, OMe), free of Lewis acids, can be achieved in high yields from [(Cp*)ScMe2]2 through a facile route. The chemical and geometrical flexibility to incorporate organic substrates indicates a rich chemistry of complex [(Cp*)Sc(μ2-OMe)]3(μ3-CH).A device coupled with an automatic gas chromatography injection sampler for high-throughput liquid-liquid microextraction has been proposed in this study. This study's main objective was to devise a trap vial directly placed in an automatic liquid sampler (ALS) to collect and inject the extractant without a transfer step. Sixteen groups of microextraction procedures were performed simultaneously to increase the overall efficiency. The experimental parameters of the extraction method were optimized using a central composite design. Under the optimal conditions, the benzene derivatives' calibration curve was linear in the range of 0.1-200 μg L-1. The limit of detection (LOD) ranged from 0.016 to 0.16 μg L-1, and the limit of quantitation (LOQ) ranged from 0.046 to 0.50 μg L-1. The enrichment factors (EFs) ranged from 254 to 1094. Intraday and interday precision were found to be in the range of 2