Iodine Promoted Regioselective α-Sulfenylation of Carbonyl Compounds using Dimethyl Sulfoxide as an Oxidant
作者:Yogesh Siddaraju、Kandikere Ramaiah Prabhu
DOI:10.1021/acs.orglett.6b03084
日期:2016.12.2
A metal-free regioselective sulfenylation of the α-CH3 group of ketones has been achieved in the presence of the α-CH2 or α-CH group using the cross dehydrogenative (CDC) strategy. Aldehydes also exhibit good selectivity forming the corresponding α-sulfenylated products. This efficient sulfenylation of ketones or aldehydes with thiones or heterocyclic thiols utilizes dimethyl sulfoxide (DMSO) as an
Zinc Oxide Catalyzed Solvent-Free Mechanochemical Route for C-S Bond Construction: A Sustainable Process
作者:P. Md. Khaja Mohinuddin、N. C. Gangi Reddy
DOI:10.1002/ejoc.201601425
日期:2017.2.24
Zinc oxide-catalyzed solvent-freemechanochemical route has been developed for the rapid construction of C-S bond using a variety of thiols and phenacyl/benzyl/alkyl bromides via a nucleophilic substitution (SN2 mechanism). Notable advantages of this method include broad substrate scope, cleaner reaction profile, safe, scalable, high yields at ambient conditions and reuse of catalyst. Further, the
of applications in organic synthesis. Their typical synthesis requires pre-functionalized starting materials and two to three step synthetic sequences. In addition, the selective pre-functionalization of unsymmetrical ketones is a challenge, which limits the synthesis of the desired sulfenylated ketones. To overcome these disadvantages, a metal-free, convenientone-step strategy for synthesizing α-sulfenyl
Redox Active Sodium Iodide/Recyclable Heterogeneous Solid Acid: An Efficient Dual Catalytic System for Electrochemically Oxidative α-C−H Thiocyanation and Sulfenylation of Ketones
An efficient electrochemically oxidative α‐C−H thiocyanation and sulfenylation of ketones has been developed in a simple undivided cell under constant current condition. The electrochemistry performs using NaI as the redox catalyst and heterogeneous solid salt Amberlyst‐15(H)® (A‐15(H)) as proton catalyst without the addition of external conductive salts. The protocol proved to be practical since the
KI/K2S2O8-Mediated α-C–H Sulfenylation of Carbonyl Compounds with (Hetero)Aryl Thiols
作者:Tao Yang、Congshan Zhou、Zan Yang、Jiao Li、Jie Hua、Jianmin Yi
DOI:10.1055/s-0036-1588483
日期:2017.10
A new and facile KI/K2S2O8-mediated α-C–H sulfenylation of carbonyl compounds with (hetero)aryl thiols was developed for the formation of C–S bond at room temperature. This method provided a simple process for the synthesis of β-keto thioethers in moderate to excellent yields. A variety of carbonyl compounds and (hetero)aryl thiols were tolerated in this reaction.