Problem to be Solved
It is intended to provide an industrially preferable fluoroalkylating agent and use thereof.
Solution
The present invention provides a fluoroalkylating agent represented by the general formula (1) wherein R
1
is a C1 to C8 fluoroalkyl group; R
2
and R
3
are each independently a C1 to C12 alkyl group or the like; Y
1
to Y
4
are each independently a hydrogen atom, a halogen atom, or the like; and X
−
is a monovalent anion.
A compound of the general formula (3): R
4
—S—R
1
having an introduced C1 to C8 fluoroalkyl group is easily obtained by reacting a compound of the general formula (2): R
4
—S—Z wherein R
4
is a hydrocarbon group or the like; and Z is a leaving group, with the compound of the general formula (1).
available aryl and alkyl thiocyanates were converted into the corresponding (benzenesulfonyl)difluoromethyl thioethers via the direct nucleophilic substitution of ((difluoromethyl)-sulfonyl)benzene under transition metal free conditions. Combined with various thiocyanation methods, this reaction can allow late-stage (benzenesulfonyl)difluoromethylthiolation of alkyl halides and aryldiazoniumsalts.
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.
The catalytic activity of β‐cyclodextrin immobilized on Dowexresin as an efficient solid‐liquid phase transfer catalyst was developed for the synthesis of alkyl thiocyanates and phenacyl derivatives in water. The nucleophilicsubstitutionreactions were performed under mild reaction condition and gave the products in excellent yields. Furthermore, the catalyst could be recycled by facile separation