This paper proposed a convenient way for producing disulfides,along which disulfides can be readily prepared in moderate to good yields via the reduction of alkylthiocyanates by the low valent titanium reagent in THF at 0℃.

Under mild conditions, β ketosulfones were readily reduced by low valent titanium reagent to give corresponding ketones in good yields.

Some organic reactions mediated by low valent vanadium reagents and their applications in organic synthesis are reviewed with an emphasis on the carbon-carbon bond formation reactions such as reductive coupling of alkyl halides, reductive coupling of aldehydes and ketones, deoxygenative alkylation and deoxygenative coupling of carbonyl compounds.

The reactions of carbonyls with a low-valent titanium reagent prepared by TiCl4with Mg in THF were carried out under ultrasonic action at room temperature for 10 min to1 h and corresponding olefins were obtained in good yields.

Pinacol coupling reaction induced by low valent titanium has higher chemoselectivity and stereoselectivity,and has increasing attracted organic chemists in recent years.

Recent developments on application of low valent titanium to organic synthesis including those of (non)natural products and their analogs, novel substrates as well as the extended/improved McMurry reac- tion are reviewed.

Aryl enamides were obtained in one step via the reduction of nitrostyrene with Ti-Zn reagent in the presence of acid anhydride or acyl chloride.

Determination of Ascorbic Acid by Tiron Fading Spectrophotometric Method;

Columinescence Effcet of Dysprosium Lanthanum Tiron System and Its Applicaton;

Effects of solution pH on the electrochemical behavior of tiron(sodium 4,5-dihydroxy-1,3-benzendisulfonic) couple(on a graphite electrode) were studied by cyclic voltammetry in aqueous solutions.