2-Chloro-1-methylpyridinium iodide, an efficient reagent for the conversion of alcohols into alkyl thiocyanates both under solvent and solvent-free conditions
作者:Babak Mokhtari、Roya Azadi、Edris Mardani
DOI:10.1016/j.tetlet.2011.11.050
日期:2012.2
reagent for the simple phosphine-free conversion of alcohols into the corresponding alkyl thiocyanates is described. This transformation can be achieved either in acetonitrile or under solvent-free conditions and the products obtained in good to excellent yields. The solvent-free procedure described here is the first report on the solvent-free thiocyanation of alcohols.
Chlorodiphenylphosphine as Highly Selective and Efficient Reagent for the Conversion of Alcohols, Tetrahydropyranyl and Silyl Ethers to Thiocyanates and Isothiocyanates
作者:Ghasem Aghapour、Ameneh Asgharzadeh
DOI:10.1080/10426507.2013.855771
日期:2014.6.3
efficient method is described for the conversion of primary alcohols, tetrahydropyranyl and silyl ethers to thiocyanates by use of chlorodiphenylphosphine and ammonium thiocyanate. Secondary substrates produce both the two isomeric products, thiocyanate and isothiocyanate, while tertiary ones give isothiocyanates as the only products by this newmethod. In contrast to previously reported methods based
Preparation of thiocyanates and isothiocyanates from alcohols, thiols, trimethylsilyl-, and tetrahydropyranyl ethers using triphenylphosphine/2,3-dichloro-5,6-dicyanobenzoquinone (DDQ)/n-Bu4NSCN system
A combination of triphenylphosphine (PPh3) and 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) provides a safe and easily available mixed reagent system for the conversion of 1° and 2° alcohols, thiols, trimethylsilyl-, and tetrahydropyranyl ethers to their corresponding thiocyanates and the 3° ones to isothiocyanates in good to high yields.
2,4,4,6-Tetrabromo-2,5-cyclohexadienone as an efficient reagent for phosphine-free electrophilic transformation of alcohols and epoxides
作者:Aslan Khajeh-Kolaki、Babak Mokhtari
DOI:10.1080/17415993.2015.1126594
日期:2016.5.3
a stable phosphine-free reagent for the conversion of alcohols into alkyl thiocyanates and epoxides into 2-hydroxythiocyanates. The reactions seem to proceed via in situ generation of electrophilic sulfur species by reaction of NH4SCN and TABCO. This combined reagent worked well with both alcohols and epoxides in acetonitrile solvent and under solvent-free conditions. GRAPHICAL ABSTRACT