- Oxo/Imido heterometathesis reactions catalyzed by a silica-supported tantalum imido complex
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Grafting Ta(=NtBu)(CH2CMe2Ph)3 onto the surface of silica partially dehydroxylated at 300°C leads to the formation of the surface imido complex (≡SiO)2Ta(=N tBu)(CH2CMe2Ph) as a major species, which was characterized with EXAFS, 13C CP/MAS NMR, diffuse reflectance FTIR, elemental analyses, and chemical reactivity. The obtained material acts as an efficient heterogeneous catalyst for various oxo/imido heterometathesis transformations: imidation of ketones and DMF with N-sulfinylamines and condensation of N-sulfinylamines into sulfurdiimines and phenyl isocyanate into diphenylcarbodiimide.
- Zhizhko, Pavel A.,Zhizhin, Anton A.,Belyakova, Olga A.,Zubavichus, Yan V.,Kolyagin, Yuriy G.,Zarubin, Dmitry N.,Ustynyuk, Nikolai A.
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supporting information
p. 3611 - 3617
(2013/07/26)
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- Cu(OAc)2-mediated cross-coupling reaction of benzophenone N,N,N-trimethylhydrazonium salts and aryl boronic acids
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Cu(OAc)2-mediated coupling of benzophenone N,N,N- trimethylhydrazonium salts and aryl boronic acids proceeded to afford N-aryl imines.
- Kitamura, Mitsuru,Tokuda, Yu,Tashiro, Norifumi,Okauchi, Tatsuo
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p. 1687 - 1690
(2013/03/13)
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- Highly reactive, general, and long-lived catalysts for coupling heteroaryl and aryl chlorides with primary nitrogen nucleophiles
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Resisting pathways for decomposition followed by palladium complexes of monodentate ligands is one characteristic of the highly reactive but long-lived catalyst generated from the Josiphos ligand L and palladium. It catalyzes under mild conditions the coupling of primary amines with chloropyridines and chloroarenes in high yield with low catalyst loadings (see scheme).
- Shen, Qilong,Shekhar, Shashank,Stambuli, James P.,Hartwig, John F.
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p. 1371 - 1375
(2007/10/03)
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- Chiral relay effect: 4-substituted 1,3-benzoxazol-2-(3H)-ones as achiral templates for enantioselective Diels-Alder reactions
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(matrix presented) A new strategy to control the enantioselectivity of Lewis acid catalyzed reactions has been investigated. The use of N-acryloyl-1,3-benzoxazol-2-(3H)-ones substituted at position 4 leads to the formation of diastereomeric complexes as a
- Quaranta, Laura,Corminboeuf, Olivier,Renaud, Philippe
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- Arylamine synthesis
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The present invention provides a method for the preparation of a wide range of primary arylamines. The arylamines are prepared in two efficient, straightforward transformations: 1) an activated aryl group and an imine group are combined, in the presence o
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- An ammonia equivalent for the palladium-catalyzed amination of aryl halides and triflates
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Commercially available benzophenone imine serves as a convenient ammonia equivalent in the palladium-catalyzed amination of aryl halides and triflates. The benzophenone imine adducts can be cleaved directly to the corresponding primary anilines by catalytic hydrogenation or treatment with hydroxylamine hydrochloride or a catalytic amount of HCl in wet THF.
- Wolfe, John P.,Ahman, Jens,Sadighi, Joseph P.,Singer, Robert A.,Buchwald, Stephen L.
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p. 6367 - 6370
(2007/10/03)
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- Preparation of Methoxy-substituted Diaryl Ketone Anils via Phenyliminodimagnesium Intermediate
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Phenyliminodimagnesium reagent (PhN(MgBr)2) and its o- and p-methoxy derivatives, prepared in THF by treatment of anilines with EtMgBr, were found to be effective for condensation with benzopheneones and fluorenone.The corresponding anils (N-(diarylmethylene)anilines) were prepared in good yields.
- Okubo, Masao,Ueda, Sonoko
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p. 281 - 282
(2007/10/02)
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