Palladium-Catalyzed Synthesis of Ammonium Sulfinates from Aryl Halides and a Sulfur Dioxide Surrogate: A Gas- and Reductant-Free Process
作者:Edward J. Emmett、Barry R. Hayter、Michael C. Willis
DOI:10.1002/anie.201404527
日期:2014.9.15
range of useful molecules and materials, and despite a variety of preparative methods being available, processes which introduce the most basic sulfonyl building block, sulfurdioxide, using catalytic methods, are rare. Described herein is a simple reaction system consisting of the sulfurdioxide surrogate DABSO, triethylamine, and a palladium(0) catalyst for effective convertion of a broad range of
Using a simple copper(I) catalyst has allowed a high yielding sulfonylative-Suzuki–Miyaura cross-coupling reaction to be developed. The process provides a single step route to diaryl sulfones from the direct combination of aryl boronic acids, sulfur dioxide and aryl iodides, and represents the first sulfonylative variant of a classic cross-coupling reaction. Sulfur dioxide is delivered from the surrogate
Mechanism of the Aryl–F Bond-Forming Step from Bi(V) Fluorides
作者:Oriol Planas、Vytautas Peciukenas、Markus Leutzsch、Nils Nöthling、Dimitrios A. Pantazis、Josep Cornella
DOI:10.1021/jacs.2c01072
日期:2022.8.17
organobismuth(V) fluorides, featuring a dianionic bis-aryl sulfoximine ligand. An exhaustive assessment of the substitution pattern in the ligand, the sulfoximine, and the reactive aryl on neutral triarylbismuth(V) difluorides revealed that formation of dimeric structures in solution promotes facile Ar–F bond formation. Noteworthy, theoretical modeling of reductive elimination from neutral bismuth(V) difluorides
cross-coupling reactions of aryl iodides and arylsulfonylhydrazides under ligand-enabled, Au(I)/Au(III) redox catalysis. This strategy operates under mild reaction conditions, requires no prefunctionalized aryl coupling partner, and works across several aryl iodides. The utility of this protocol is highlighted through the synthesis of various medicinally relevant biaryl sulfones. The reaction mechanism is supported
Generation of sulfones utilizing β-sulfinyl esters as masked aryl sulfinates under redox-neutral conditions
作者:Yixin Zhang、Zhu Yang、Hongjun Yang、Xuefeng Li、Lu Yang
DOI:10.1039/d4ob00238e
日期:——
A method for generation of SVI sulfones from β-sulfinyl esters (SIV) under transition-metal-free non-oxidative mild conditions is presented. Various sulfones have been achieved with moderate to excellent yields. The advantage of using β-sulfinyl esters as masked aryl sulfinates has also been exemplified using brominated substrates. Oxygen isotope-labeling experiments indicated that the oxygen atoms
提出了一种在不含过渡金属的非氧化温和条件下由 β-亚磺酰酯 (S IV ) 生成 S VI砜的方法。各种砜的产率均达到中等至优异。使用 β-亚磺酰酯作为掩蔽芳基亚磺酸盐的优点也已通过使用溴化底物得到例证。氧同位素标记实验表明,掺入到砜产物中的氧原子来自β-亚磺酰酯的亚砜。针对从S IV生成S VI的机理,提出了连续的β-消除/ O-加成/亚磺酸酯化/β-消除过程。