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2004
Thioethers
Q 0580
46- 088
A General and Efficient Method for the Palladium-Catalyzed Cross-Coupling of
Thiols and Secondary Phosphines. — By use of a Pd(OAc)2/diphosphinoferrocene
catalyst system the substrate scope of the title reaction is significantly broader than previous methods. Electron-rich and sterically hindered aryl halides, unactivated aryl chlorides as well as primary, secondary and tertiary and aromatic thiols can be applied. The
catalyst system is also effective for the coupling of aryl halides with secondary phosphines. In the case of dihalobenzenes (XV), chemoselective phosphination takes place,
and only diphosphinated product (XX) is isolated from biphenyl derivative (XIX). —
(MURATA, M.; BUCHWALD*, S. L.; Tetrahedron 60 (2004) 34, 7397-7403; Dep.
Chem., MIT, Cambridge, MA 02139, USA; Eng.) — Klein
2004
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