Efficient rhodium-catalyzed Sommelet-Hauser type rearrangement of 3-diazoindolin-2-ones with a-thioesters has been accomplished for the synthesis of C4-thioalkylated oxindoles. The developed reaction offers the selective functionalization of C4-position of oxindole via generation of S-ylide and [2, 3]-sigmatropic rearrangement and allows access to diverse C4-thioalkylated oxindoles in good to excellent yield. Furthermore, the method was successfully extended to the synthesis C4-selenoalkylated oxindoles employing the corresponding a-selenoester.

To mitigate the mismatch between energy availability and energy demand due to day/night shifts and seasonal variations, intensive efforts are dedicated to storing renewable energy in various energy storage modules....

Hydrogen economy is an ideal energy vector to offer a carbon-neutral energy pathway. However, the contamination of produced hydrogen with carbonaceous and non-carbonaceous impurities beyond the tolerance level of a...