One-pot thiol-free synthetic approach to sulfides, and sulfoxides selectively

A facile and efficient thiol-free one-pot method for direct synthesis of sulfides and sulfoxides under green conditions without using any metal catalyst is reported. For this purpose, we used benzyl bromides as starting materials in the presence of potassium thioacetate (PTA) and Oxone® which are low-cost, and readily accessible chemicals. This method is highly compatible with a variety of functional groups and delivered a series of sulfides, bis-sulfides, and sulfoxides in good yields. The selective formation of sulfoxides over sulfones is discussed via a mechanism.

A facile and efficient thiol-free one-pot method for direct synthesis of sulfides and sulfoxides under green conditions without using any metal catalyst is reported.

Cesium carbonate-promoted synthesis of aryl methyl sulfides using S-methylisothiourea sulfate under transition-metal-free conditions

In the presence of cesium carbonate, an efficient synthesis of aryl methyl sulfides by the reactions of aryl halides with commercially available S-methylisothiourea sulfate is developed. This odourless and highly crystalline solid can be used as the substitute for malodorous methanethiol. The gram-scale reaction also proceeds smoothly without the use of column chromatography separation. Similarly, 2-(dimethylamino)ethylthio and cyclopropylmethylthio groups can be easily introduced into the aromatic rings from the corresponding S-[2-(dimethylamino)ethyl]isothiourea dihydrochloride and S-cyclopropylmethylisothiourea hydrobromide. The possible reaction mechanism is proposed. It is believed that this route to aryl alkyl sulfides is well competitive with currently known methods due to its wide substrate scope, excellent yields, easy operation and transition-metal-free conditions.

Catalytic, Reversible Arylation of Phosphines and Sulfides

A fair exchange: Morandi and co-workers have reported a process that enables the exchange of aryl groups on sulfur or phosphorus. Building on established aryl-transfer reactions, this Pd-catalyzed metathesis can be used to diversify thioanisoles and generate cyclic phosphines.

Two-step three-component process for one-pot synthesis of 8-alkylmercaptocaffeine derivatives

A two-step three-component process for one-pot synthesis of some 8-alkylmercaptocaffeine derivatives has been described using alkyl bromides, thiourea, and 8-bromocaffeine.

Self-assembly of thioether functionalized fullerenes on gold and their activity in electropolymerization of styrene

Fulleropyrrolidine alkylaromatic sulphides were found to form uniform coating on the gold surface through the thioether sulphur anchoring group and can initiate the anionic polymerization of styrene under electrochemical conditions.

Base-regulated tunable synthesis of pyridobenzoxazepinones and pyridobenzoxazines

A base-regulated one-pot protocol for the tunable synthesis of pyridobenzoxazepinones and pyridobenzoxazines has been developed. Pyridobenzoxazepinones and pyridobenzoxazines were produced in good yields selectively.

An odorless thia-Michael addition using Bunte salts as thiol surrogates

An efficient thia-Michael addition using odorless, easy to synthesis and handle Bunte salts as thiol surrogates is introduced.