1-phenylallyl pivalates was developed through reductive C(sp3)–Obondcleavage. This method represents the first example of the direct application of vastly abundant calcium granules to a reductive coupling reaction. A broad range of propargylsilanes and allylsilanes are simply prepared using easy-to-handle pivalates and chlorotrimethylsilane under mild catalyst-free and additive-free conditions.
Gold(I)-Catalyzed Synthesis of Tetrahydrocarbazoles<i>via</i>Cascade [3,3]-Propargylic Rearrangement/[4+2] Cycloaddition of Vinylindoles and Propargylic Esters
A gold(I)‐catalyzed cascade [3,3]‐propargylic rearrangement and [4+2] cycloaddition reaction of 2‐vinylindoles with propargylicesters is reported. The reaction leads to the synthesis of highly substituted tetrahydrocarbazole derivatives in high yields and diasteroselectivities. Furthermore, a preliminary screening for an asymmetric version of this reaction is described.