Nondirected Copper-Catalyzed Sulfoxidations of Benzylic C–H Bonds
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1021/acs.orglett.8b00615
日期:2018.4.6
A copper-catalyzed sulfoxidation of benzylic C–H bonds by nondirected oxidative C(sp3)-H activation was developed. The process proceeds via sulfenate anions, which are generated by base-triggered elimination of β-sulfinyl esters and benzyl radicals. The functional group tolerance is high, and the product yields are good.
Aryl Sulfoxides via Palladium-Catalyzed Arylation of Sulfenate Anions
作者:Guillaume Maitro、Sophie Vogel、Guillaume Prestat、David Madec、Giovanni Poli
DOI:10.1021/ol062315a
日期:2006.12.1
[Structure: see text] Palladium-catalyzedarylation of sulfenate anions generated from beta-sulfinyl esters can take place under biphasic conditions. This hitherto unknown reaction provides a simple, mild, and efficient route to aryl sulfoxides in good yields. The development of a new pseudo-domino type I procedure involving a sulfinylation followed by a Mirozoki-Heck coupling is also described.
Herein we reported an efficient palladium-catalyzed enantioselective arylation of both alkyl and aryl sulfenate anions to deliver various chiral sulfoxides in good yields (up to 98%) with excellent enantioselectivities (up to 99% ee) by the use of our developed chiral O,P-ligands (PC-Phos). PC-Phos are easily prepared in shortsteps from inexpensive commercially available starting materials. The single-crystal
Transition-Metal-Free Arylations of In-Situ Generated Sulfenates with Diaryliodonium Salts
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1021/acs.orglett.8b03046
日期:2018.11.16
A transition-metal-free arylation of sulfenate anions generated from β-sulfinyl esters with diaryliodoniumsalts was developed. In this process, a new C–S bond is formed under mild reaction conditions providing a wide range of S,S-diaryl and S-alkyl S-aryl sulfoxides.