Xinzheng Chen

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An efficient approach towards the first racemic total synthesis of dactyloidin (2) and demethyldactyloidin (3) is described. Their oxygen-bridged tricyclic ketal systems were rapidly constructed by using a remarkable biomimetic Knoevenagel condensation/[4 + 2] cycloaddition cascade as the critical strategy and the 1,5-dicarbonyl segment was assembled by(More)
A remarkable TFA-mediated method for the construction of a biologically interesting tricyclic ketal skeleton was uncovered by starting from a variety of readily available acylphloroglucinol and diacylphloroglucinol substrates. This approach, which mimics a biosynthetic olefin isomerization/hemiacetalization/dehydration/(3 + 3) type cycloaddition sequence(More)
A blue-light-promoted carbon-carbon double bond isomerization in the absence of any photoredox catalyst is reported. It provides rapid access to a series of quinolines in good to excellent yields under simple aerobic conditions. The protocol is direct, catalyst-free and operationally convenient.
A new decarboxylative Csp(3)-Csp(3) coupling approach for the benzylation of ketone enolates has been developed. A variety of raspberry ketone derivatives were conveniently synthesized in good to excellent yields under mild conditions. A crossover reaction shed light on the mechanism of this tandem reaction.
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