- Carbon-Silicon Bond Formation in the Synthesis of Benzylic Silanes
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Sterically encumbered organosilanes can be difficult to synthesize with conventional, strongly basic reagents; the harsh reaction conditions are often low yielding and not suitable for many functional groups. As an alternative to the typical anionic strat
- Visco, Michael D.,Wieting, Joshua M.,Mattson, Anita E.
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p. 2883 - 2885
(2016/07/06)
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- Silanediol hydrogen bonding activation of carbonyl compounds
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Geo-inspired activation: The first example of silanediols activating amide and aldehyde substrates through hydrogen bonding is described. Both NMR and X-ray co-crystallization studies demonstrate binding modes and affinity, and show that silanediol hydrogen-bonding assemblies can be modulated by the addition of carbonyl compounds. These silanols show catalysis in a Diels-Alder reaction and provide insight into the design of new organocatalysts (see figure). Copyright
- Tran, Ngon T.,Min, Taewoo,Franz, Annaliese K.
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supporting information; experimental part
p. 9897 - 9900
(2011/10/09)
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- Synthesis, structure and photoluminescence of 1,2-disila-acenaphthene Si2C10H10 and 1,2-diaryldisilane reference compounds
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For the synthesis of the diaryldisilanes Ar-SiH2SiH2-Ar (la, Ar = phenyl; Ib, Ar = p-tolyl; le, Ar = mesityl; Id, Ar = p-anisyl) two convenient preparative routes are reported. The crystal structures of le and Id have been determined in Xray diffraction studies; the disilanes have a staggered transconformation with a crystallographically imposed center of inversion. For la-d no photoluminescence phenomena can be observed. 1,2-Disila-acenaphthene (2) is synthesized in acceptable yield by treatment of 1,8-dilithionaphthalene with 1 equivalent of l,2-bis[((trifluoromethyl)sulfonyl)oxy]disilane Tf-SiH2SiH2-Tf. The crystal structure of 2 has also been determined by X-ray diffraction. The molecule has no crystallographically imposed symmetry but closely follows the symmetry elements of point group C2v. Solutions of 2 exhibit intense fluorescence in the near UV region at room temperature. The fluorescence spectra are discussed in comparison with data on acenaphthene and naphthalene. WILEY-VCH Verlag GmbH 1997.
- Soeldner, Marcus,Sandor, Mario,Schier, Annette,Schmidbaur, Hubert
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p. 1671 - 1676
(2007/10/03)
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