Mn(II)-Catalyzed Markovnikov Hydroiodination of Terminal Aryl Alkynes.

A Mn(II)-catalyzed Markovnikov hydroiodination of terminal aryl alkynes with TMSI as the iodination reagent has been developed. Cheap Mn(OAc)·4HO was employed as the catalyst. Twenty-five aryl alkynes (including two internal alkynes) were successfully transformed into their α-iodide styrene derivatives, including those natural product-based alkynes and poly alkynyl benzenes.

Lewis acid catalyzed Markovnikov hydrobromination and hydrochlorination of alkynes using TMSX (X = Br, Cl).

Markovnikov hydrobromination and hydrochlorination of alkynes were achieved using TMSX (X = Br, Cl) instead of corrosive HX (X = Br, Cl) as the bromination and chlorination reagents. Mn(OAc)·4HO was used as the hydrobromination catalyst for electron-neutral/rich alkynes. For the hydrobromination of electron-deficient alkynes and hydrochlorination of alkynes, Zn(OAc)·2HO was employed as the catalyst.

Ru-Catalyzed Synthesis of α,β-Unsaturated Acylsilanes and Its Applications in C-N Bond Formation.

α,β-Unsaturated acylsilanes have multifunctional sites and can be used in many transformations. However, the existing methods for preparing them generally suffer from problems, such as low atom and step economy, a narrow substrate scope, etc. Herein, an efficient and general method for accessing α,β-unsaturated acylsilanes through Ru-catalyzed cross-metathesis has been developed.

Z-Scheme In S /NU-1000 Heterojunction for Boosting Photo-Oxidation of Sulfide into Sulfoxide under Ambient Conditions.

Photocatalytic oxidation of sulfide into sulfoxide has attracted extensive attention as an environmentally friendly strategy for chemical transformations or toxic chemicals degradation. Herein, we construct a series of In S /NU-1000 heterojunction photocatalysts, which can efficiently catalyze the oxidation of sulfides to form sulfoxides as the sole product under LED lamp (full-spectrum) illumination in air at room temperature. Especially, the sulfur mustard simulant, 2-chloroethyl ethyl sulfide (CEES), can also be photocatalytically oxidized with In S /NU-1000 to afford nontoxic 2-chloroethyl ethyl sulfoxide (CEESO) selectively and effectively.