Trideuteromethylation Enabled by a Sulfoxonium Metathesis Reaction
作者:Zuyuan Shen、Shilei Zhang、Huihui Geng、Jiarui Wang、Xinyu Zhang、Anqi Zhou、Cheng Yao、Xiaobei Chen、Wei Wang
DOI:10.1021/acs.orglett.8b03641
日期:2019.1.18
A conceptually novel sulfoxonium metathesisreaction between TMSOI and cost-effective DMSO-d6 is developed for the efficient generation of a new trideuteromethylation reagent TDMSOI. The new reagent TDMSOI is produced highly efficiently by simply heating a mixture of TMSOI and DMSO-d6 and directly used for subsequent trideuteromethylation in a “one-pot” operation. The preparative power of the new versatile
TMSOI 和经济高效的 DMSO- d 6之间的概念上新颖的硫鎓复分解反应被开发出来,用于有效生成新型三氘代甲基化试剂 TDMSOI。新试剂TDMSOI只需加热TMSOI和DMSO- d 6的混合物即可高效生产,并直接用于后续的“一锅”操作中的三氘代甲基化。新的多功能试剂和“一锅”方案的制备能力通过其以高产率和有用的方式将-CD 3部分安装到广泛的功能中而得到证明,包括苯酚、苯硫酚、酸性胺和烯醇化亚甲基单元。氘化水平 (>87% D)。
Switching on elusive organometallic mechanisms with photoredox catalysis
作者:Jack A. Terrett、James D. Cuthbertson、Valerie W. Shurtleff、David W. C. MacMillan
DOI:10.1038/nature14875
日期:2015.8
step) to occur via a Ni(iii) alkoxide intermediate. Here we demonstrate that visible-light-excited photoredox catalysts can modulate the preferred oxidation states of nickel alkoxides in an operative catalytic cycle, thereby providing transient access to Ni(iii) species that readily participate in reductive elimination. Using this synergistic merger of photoredox and nickel catalysis, we have developed
A convenient photo-dehalogenation of α-haloketones was developed under irradiation with a purple LED. This simple method does not require any catalyst and water could act as the sole additive, affording efficiently the dehalogenated products with different substituents at room temperature in air atmosphere. Mechanistic study indicated that the ether solvent is also the photoreductant for the reaction
在紫色 LED 的照射下,开发了一种方便的 α-卤代酮光脱卤方法。这种简单的方法不需要任何催化剂,水可以作为唯一的添加剂,在室温和空气气氛中有效地提供具有不同取代基的脱卤产物。机理研究表明,醚类溶剂也是该反应的光还原剂,使用氘代溶剂可以实现酮产物的α-氘化。