New methodologies based on benzeneseleninic acid (BSA) were designed to efficiently synthesize multiple disulfide bonds or thioether bridges in peptides in a one-pot manner in which BSA dually functioned as an oxidant and a deprotecting reagent.
Cascade reactions of 3-hydroxymethyl-3-propenylindole-2-thiones afforded diolefins and involved deformylation, thioenolate alkylation, and the thio-Claisen rearrangement. The subsequent ring-closing metathesis reactions were demonstrated.
The addition of moderate amounts of Ag and Cu to Pd significantly enhances the isoamylene yield in isoprene hydrogenation. The surface Pd composition ratio between the metallic and oxidized states shows significant effects on the monoolefines yield.
GC-APPI-FTICR MS is particularly efficient for the characterization of complex organic mixtures such as plastic pyrolysis oil. The use of dopants allows control of ionization efficiency and selectivity to target specific families of molecules.
This work reveals the kinetic reasons for the inversion of the intermediates during catalytic selective reactions by using a model system.