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Temperature‐Controlled Chemoselective Synthesis of Thiosulfonates and Thiocyanates: Novel Reactivity of KXCN (X=S, Se) towards Organosulfonyl Chlorides
作者:Pratibha Kalaramna、Avijit Goswami
DOI:10.1002/ejoc.202101031
日期:2021.10.14
Thiosulfonates and thiocyanates can be prepared chemoselectively by treating organosulfonyl chlorides with potassium thio-/selenocyanate. The protocol furnished the products in good yields of up to 95 %. For the first time, we are reporting a protocol to synthesize thiosulfonate and thiocyanate selectively by single reaction strategy.
Iron-Catalyzed Decarboxylation of Trifluoroacetate and Its Application to the Synthesis of Trifluoromethyl Thioethers
作者:Benjamin Exner、Bilguun Bayarmagnai、Fan Jia、Lukas J. Goossen
DOI:10.1002/chem.201503915
日期:2015.11.23
Nucleophilic CF3 has been generated by decarboxylation of potassium trifluoroacetate, arguably the most easy‐to‐handle, inexpensive, and sustainable source of trifluoromethyl groups. Simple iron(II) chloride catalyzes the decarboxylation as well as a subsequent trifluoromethylation of organothiocyanates, resulting in a straightforward synthesis of trifluoromethylthioethers. The KCN byproduct is absorbed by
Synthesis of Difluoromethyl Thioethers from Difluoromethyl Trimethylsilane and Organothiocyanates Generated In Situ
作者:Bilguun Bayarmagnai、Christian Matheis、Kévin Jouvin、Lukas J. Goossen
DOI:10.1002/anie.201500899
日期:2015.5.4
A copper‐CF2H complex generated in situfrom copper thiocyanate and TMSCF2H smoothly converts organothiocyanates into valuable difluoromethylthioethers. This reaction step can be combined with several thiocyanation methods to one‐pot protocols, allowing late‐stage difluoromethylthiolations of widely available alkyl halides and arenediazonium salts. This strategy enables the introduction of difluoromethylthio
Two-step synthesized sulfonic acid functionalized imidazolium thiocyanate solid acid catalyst for thiocyanation of various electron rich arenes by metal-free method in water
作者:Sobhan Rezayati、Zahra Naserifar、Ali Ramazani
DOI:10.1080/10426507.2022.2052879
日期:2022.10.3
Abstract An eco-friendly, highly efficient, and novel sulfonicacid functionalized imidazolium thiocyanate (Imidazole-SO3H)/SCN and sulfonicacid functionalized imidazolium chloride (Imidazole-SO3H)/Cl solid acid catalyst were successfully synthesized. The structure of catalyst was characterized by various analyses such as FT-IR, 1H NMR and 13CNMR spectroscopy. The thiocyanation reaction of various
Azonafide Derivatives, Methods for Their Production and Pharmaceutical Compositions Therefrom
申请人:Van Quaquebeke Eric
公开号:US20080292585A1
公开(公告)日:2008-11-27
Azonafide derivatives are obtained by reacting azonafide with aldehydes, acyl halides, thioacyl halides, monoisocyanates, isothiocyanates, sulfonyl halides, monohalogenoalkanes, monohalogenoalkenes or monohalogenoalkynes, and are useful as active ingredients of pharmaceutical compositions for the prevention and treatment of cell proliferative disorders, in particular several forms of Cancer.