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Planar Chiral P,O‐Compounds Derived from Ferrocenyl Aryl Ethers
Author(s) -
Schaarschmidt Dieter,
Lang Heinrich
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000722
Subject(s) - chemistry , aryl , palladium , halide , yield (engineering) , catalysis , tetramethylethylenediamine , medicinal chemistry , suzuki reaction , bromide , combinatorial chemistry , enantioselective synthesis , organic chemistry , alkyl , materials science , metallurgy
The ortho ‐directed lithiation of FcOC 6 H 4 ‐4‐ t Bu ( 1 ) [Fc = (η 5 ‐C 5 H 4 )(η 5 ‐C 5 H 5 )Fe] with n BuLi/tmeda is reported (tmeda = tetramethylethylenediamine). In this reaction, multimetalation occurs to yield novel 1,2‐functionalized P,O‐derivatives that contain up to four phosphanyl moieties as determined by NMR spectroscopic studies and single‐crystal X‐ray diffraction analysis. Thus available planar chiral P,O‐ferrocenes can successfully be applied in the palladium‐catalyzed Suzuki coupling of diverse aryl halides and aryl boronic acids. The aforementioned systems allow the activation of carbon–chlorine bonds in an efficient way and tolerate catalyst loadings as low as 10 ppm. Noteworthy is their remarkable ability to economically generate hindered biaryls under mild reaction conditions.