Abstract A number of alkyl, aryl and bifunctional isothiocyanates are obtained in moderate to high yields (41–94%) in a two-step, one-pot reaction of the parent primary amines or their salts with carbondisulfide, followed by reaction of the thus formed dithiocarbamates with T3P® (propane phosphonic acid anhydride) as a new and efficient desulfurating agent. A number of alkyl, aryl and bifunctional isothiocyanates
Direct, Microwave-Assisted Synthesis of Isothiocyanates
作者:Łukasz Janczewski、Anna Gajda、Tadeusz Gajda
DOI:10.1002/ejoc.201900105
日期:2019.4.16
Application of microwave technique allowed to accomplish novel, general and “greener” one‐pot protocol for the synthesis of isothiocyanates from amines. Reactions are easily scalable and take place without racemization of chiral amines. Decomposition of the intermediate dithiocarbamates into isothiocyanates proceeds without any additional desulfurating agent under these conditions.
A new diphenylphosphinite ionic liquid (IL-OPPh2) as reagent and solvent for highly selective bromination, thiocyanation or isothiocyanation of alcohols and trimethylsilyl and tetrahydropyranyl ethers
作者:Nasser Iranpoor、Habib Firouzabadi、Roya Azadi
DOI:10.1016/j.tetlet.2006.05.145
日期:2006.7
A new diphenylphosphinite ionic liquid (IL-OPPh2) is introduced. This ionic liquid is used as both a reagent and a solvent to convert alcohols and trimethylsilyl and tetrahydropyranyl (THP) ethers into their corresponding alkyl bromides, thiocyanates or isothiocyanates in the presence of Br2 and SCN− at 80 °C. In this ionic liquid, bromination and thiocyanation of alcohols occurs highly selectively
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.