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.
Efficient One-pot Thiocyanation of Primary, Secondary and Tertiary Alcohols by in situ Generation of Ph3P(SCN)2. A Modified Procedure
作者:N. Iranpoor、H. Firouzabadi、H. R. Shaterian
DOI:10.1039/a906113d
日期:——
The preparation of Ph3P(SCN)2 is modified by using a combination of Ph3P, NH4SCN and Br2 at room temperature for the efficient conversion of primary, secondary and tertiaryalcohols to their corresponding thiocyanates in excellent yields.
Novel Antimalarial 9A-Carbamoyl-Aminoalkyl and 9A-Thiocarbamoyl-Aminoalkyl Azalides
申请人:Bukvic Krajacic Mirjana
公开号:US20080200404A1
公开(公告)日:2008-08-21
Novel 9a-N′-substituted-carbamoyl- and thiocarbamoyl-aminoalkyl-9a-aza-9-deoxo-9-dihydro-9a-homoerythromycin A and 3-O-decladinosyl-9a-aza-9-deoxo-9-dihydro-9a-homoerythromycin A compounds having antimalarial activity are claimed. More particularly, the invention relates to 9a-N′-substituted-carbamoyl- and thiocarbamoyl-β-aminoethyl- or -γ-aminopropyl-9a-aza-9-deoxo-9-dihydro-9a-homoerythromycin A and 3-O-decladinosyl-9a-aza-9-deoxo-9-dihydro-9a-homoerythromycin A compounds and to pharmaceutically acceptable derivatives thereof having antimalarial activity.