Efficient copper(I)-catalyzed C–S cross-coupling of thiols with aryl halides in an aqueous two-phase system
作者:Xin-Yan Zhang、Xiao-Yan Zhang、Sheng-Rong Guo
DOI:10.1080/17415993.2010.547197
日期:2011.2.1
A mild and convenient C–S bond formation reaction catalyzed by CuI/L-proline in an aqueous two-phase system was achieved, providing a simple method for the synthesis of aryl sulfides in good yields.
2‐Pyridyl Sulfoxide: A Versatile and Removable Directing Group for the Pd
<sup>II</sup>
‐Catalyzed Direct CH Olefination of Arenes
作者:Alfonso García‐Rubia、M. Ángeles Fernández‐Ibáñez、Ramón Gómez Arrayás、Juan Carlos Carretero
DOI:10.1002/chem.201003633
日期:2011.3.21
Removable and versatile: The 2‐pyridylsulfinyl group has proved to be an efficient directinggroup in the PdII‐catalyzed aryl ortho CH olefination. This catalyst system enables the sequential double olefination to give asymmetrically di‐ortho‐functionalized arenes. The sulfinyl directinggroup can be easily cleaved, providing access to 1,3‐disubstituted arenes, or transformed into a thiol group.
provide efficient synthetic access to heteroaryl sulfones in two-steps using a simple palladium–1,1′-bis[(diphenyl)phosphanyl]ferrocene catalyst to form in high yields variously functionalized heteroaromatic thioethers. Pyridinyl-containing substrates can be subsequently selectively oxidized into sulfones and NH-sulfoximines by using very mild oxidation conditions with a high functional group tolerance
Palladium-catalyzed C–H thiolation of aryl 2-pyridyl sulfoxide with diaryl disulfides has been achieved. The reaction proceeds selectively at the ortho-position of masked thiophenol. The directing group 2-pyridyl sulfoxide can be further converted to various sulfur functionalities through conventional reduction/oxidation processes. Kinetic isotopic studies and radical quenching experiments were performed
PROCESS FOR PRODUCING AROMATIC OR HETEROAROMATIC SULFUR COMPOUNDS
申请人:SUMITOMO SEIKA CHEMICALS CO., LTD.
公开号:EP0742201A1
公开(公告)日:1996-11-13
The present invention provides a process for preparing an aromatic or heteroaromatic thiol represented by the formula (2), the process comprising hydrolyzing an aromatic or heteroaromatic halogenated methyl sulfide represented by the formula (1)
Ar(̵SCH3-mXm)n (1)
Ar(̵SH)n (2)
wherein Ar is an aromatic or heteroaromatic ring which has no substituent or which has an optional substituent or substituents, X is a halogen atom, m is an integer of 1 to 3 and n is 1 or 2.
According to the present invention, an aromatic or heteroaromatic thiol can be prepared at a commercially low cost and with ease.