Unusual Reactivity of Dimethylsulfoxonium Methylide with Esters
作者:Antonella Leggio、Rosaria De Marco、Francesca Perri、Mariagiovanna Spinella、Angelo Liguori
DOI:10.1002/ejoc.201101031
日期:2012.1
The dimethylsulfoxonium methylide was treated with esters under mild conditions to rapidly afford the corresponding carboxylic acids at room temperature. Moreover, by performing the procedure on enantiopure substrates, it was demonstrated that the reaction occurs without racemization. 18O-labeled reagents showed that the reaction does not proceed through an ester hydrolysis mechanism. The reactions
Metal-Free Chemoselective Reaction of Sulfoxonium Ylides and Thiosulfonates: Diverse Synthesis of 1,4-Diketones, Aryl Sulfursulfoxonium Ylides, and β-Keto Thiosulfones Derivatives
作者:Fei Wang、Bo-Xi Liu、Weidong Rao、Shun-Yi Wang
DOI:10.1021/acs.orglett.0c02370
日期:2020.8.21
A diverse chemoselective insertion reaction of sulfoxonium ylides and thiosulfonates under transition-metal-free conditions is developed, which successfully affords 1,4-diketone compounds, arylthiosulfoxide-ylides, and β-keto thiosulfones, respectively. The nucleophilic addition of two molecular sulfoxonium ylides to construct sulfone-substituted 1,4-dione compounds is the highlight of this work.
PROCESS FOR THE PREPARATION OF ALPHA-CHLOROKETONES FROM ALKYL ESTERS
申请人:Nugent Aloysius William
公开号:US20050090670A1
公开(公告)日:2005-04-28
The present invention relates to a process for the preparation of α-chloroketones from readily available alkyl esters by the reaction of a sulfoxonium ylide on said alkyl esters to generate a keto sulfoxonium ylide that is in turn treated with anhydrous HCl.
Improvement in the One-Carbon Chain Extension of Esters with Dimethylsulfoxonium Methylide
作者:Hoa Luong、Eduard Luss-Lusis、Gerald J. Tanoury、William A. Nugent
DOI:10.1002/ejoc.201300526
日期:2013.7
A recent report suggests that the reaction of dimethylsulfoxonium methylide with esters does not produce a chain-extended sulfur ylide as previously reported, but rather affords the corresponding carboxylate salt. We have investigated this assertion by using a combination of ab initio molecular orbital calculations, spiking studies, and isotopic labeling. The formation of carboxylate is unambiguously
最近的一份报告表明,二甲基亚砜与酯的反应不会产生如先前报道的链延长的硫叶立德,而是提供相应的羧酸盐。我们通过结合使用 ab initio 分子轨道计算、加标研究和同位素标记研究了这一断言。明确证明羧酸盐的形成是通过涉及外来水的水解产生的,外来水主要来自商业三甲基氯化亚砜中的水分。该试剂的仔细真空干燥减少了竞争性水解途径,导致链延长反应的产率比以前报道的更高。
Rhodium(III)-catalyzed C–H functionalization of C-alkenyl azoles with sulfoxonium ylides for the synthesis of bridgehead N-fused [5,6]-bicyclic heterocycles
作者:Gia L. Hoang、Jonathan A. Ellman
DOI:10.1016/j.tet.2018.03.062
日期:2018.6
The synthesis of bridgehead N-fused [5,6]-bicyclic heterocycles via rhodium(III)-catalyzed C–H functionalization of C-alkenyl azoles with sulfoxonium ylides is disclosed. Reactions proceeded in good to high yields for a range of aryl, heteroaryl and alkyl sulfoxonium ylides. In addition, 2-alkenyl imidazoles with different substitution patterns as well as C-alkenyl triazoles were effective inputs.