A CuI promoted sulfenylation of organozinc reagents with arylsulfonyl chlorides/PPh3 has been explored. This reaction proceeded smoothly through an alkyl/aryl radical (generated from organometallics) under mild conditions and produced the desired sulfide products in excellent yields.
Copper‐Catalyzed Electrophilic Thiolation of Organozinc Halides by Using
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‐Thiophthalimides Leading to Polyfunctional Thioethers
作者:Simon Graßl、Clémence Hamze、Thaddäus J. Koller、Paul Knochel
DOI:10.1002/chem.201806261
日期:2019.3.12
(Hetero)aryl, benzylic, and alkyl zinc halides were thiolated with N‐thiophthalimides at 25 °C within 1 h in the presence of 5–10 % Cu(OAc)2⋅H2O to furnish the corresponding polyfunctionalized thioethers in good yields. This electrophilic thiolation was extended to the introduction of trifluoromethylthio (SCF3), thiocyanate (SCN), and selenophenyl (SePh) groups. The utility of this method was shown
A direct meta-lithiation route to 1,3-disubstituted ferrocenes
作者:Christophe Pichon、Barbara Odell、John M. Brown
DOI:10.1039/b314641c
日期:——
Ferrocenyl sulfides afford meta-lithiation products with up to 94% regioselectivity on reaction with s-BuLi; the resulting 1,3-disubstitutedferrocenes can then be reacted with a variety of electrophiles.
spectra and thermoanalytical data are discussed. The electron-withdrawing sulfonium group is directly bonded to the ferrocenyl unit, therefore this cationic group influences the potential of these ionicliquids in a more pronounced way than being anchored to the ferrocenyl unit via an organic spacer. With their low absorbance in the visible light and reversible, tunable redox potential, these room temperature