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With a low loading of Rose Bengal (1 mol%) and green LED irradiation, α-ketoesters are efficiently synthesized with excellent product diversity and selectivity via the ambient cleavage of the enaminone CC double bond.

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The tandem C-H bond trifluoromethylation and chromone annulation reactions of o-hydroxyphenyl enaminones have been realized for the practical synthesis of 3-trifluoromethyl chromones. The reactions are performed efficiently with the promotion...

While there is abundant research on fibre reinforced polymer (FRP)-confined circular concrete columns, information on FRP-confined rectangular concrete columns is much more limited. This paper thus presents the axial compression test results of carbon fibre reinforced polymer (CFRP)-confined concrete short columns with rectangular cross-sections. The parameters considered in this study were (a) the concrete strength; (b) the cross-sectional aspect ratio; (d ) the number of CFRP layers; and (d ) the corner radius. Five existing design-oriented models were used to predict the stress-strain curves of the test specimens with an aim to verify their accuracy. Considerable deviations were found between various model predictions.