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[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Natural products have long been recognized for their medicinal value in traditional medicine and remain an important component of modern drug discovery. Known for their immense structural diversity, natural products are secondary metabolites that often exhibit unique pharmacological properties. In t... |
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Catalytic dehydrocoupling of phosphines was investigated using the anionic zirconocene trihydride salts [Cp*Zr-2(mu-H)(3)Li](3) (1a) or [Cp*Zr-2(mu-H)(3)K(thf)(4)] (1b), and the metallocycles [CpTi(NPtBu3)(CH2)(4)] (6) and [Cp*M(NPtBu3)(CH2)(4)] (M = Ti 20, Zr 21) as catalyst precursors. Dehydrocoup...  |
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Oxidation of Cr[N(SiMe3)(2)](2)(THF)(2) with iodine and dicumyl peroxide results in tetrahedral Cr(IV)Cr[N(SiMe3)(2)](2)I-2 and trigonal planar Cr(III) Cr[N(SiMe3)(2)](OCMe2Ph)(2), respectively; both complexes have been characterised by single-crystal X-ray diffraction, and both are active for ethyl... |
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[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Abstract: The reaction of (Me3SiC5H4)2ZrCl2 with excess LiAlH4 affords the product 5. The structural characterization of 5 reveals two types of aggregation of the (Me3SiC5H4)2ZrH2 and AlH3 fragments formulated as [(Me3SiC5H4)2ZrH(-H)2]3Al and [(Me3SiC5H4)2ZrH(-H)2]2AlH. In this Zr3Al aggregate, thre... |
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Abstract: 1,2-disubstituted cyclopentadienyl diimine anions are examples of extended -systems that bind metals through the nitrogen atoms. Reaction of Cp2Mg with benzonitrile gives the product (1,2-C5H3(C(Ph)NH)2)CpMg(NCPh) (1) in 98% yield. In an analogous manner, the related complexes (1,2-C5H3(C(... |
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[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Abstract: Synthetic pathways to several salts of the anion [Cp*2ZrH3]- have been developed. Reaction of Cp*2ZrH2 (3) prepared from [Cp*2Zr(N2)]2(-N2) (2), with KH in THF, afforded [Cp*2ZrH3]K (1) in a 74% yield. In a similar manner, addition of LiH gave [Cp*2ZrH3]Li (4). While this synthetic pathway... |
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Abstract: The reactions of Cp2MH3 (M = Nb, Ta) or Cp'2NbH3 (Cp' = Me3SiC5H4) with excess primary phosphines yield the complexes Cp2NbH[(PPh)2] (1), Cp'2NbH[(PPh)2] (2), and Cp2TaH[(PR)2] (R = Ph, 3; R = Cy, 4). Crystallographic studies of each of these compounds confirmed the transoid disposition of... |
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] Abstract: The complexes [CpTi(SCHCH2CH2S)]2 (Cp = Cp (3), MeCp (4)) are readily prepared from reaction of CpTi(SCH2CH2CH2S)Cl (Cp = Cp (1), MeCp (2)) with MeLi, AlMe3, or t-BuLi. Both compounds are centrosymmetric dimers in the solid state containing strained thiatitanacyclopropane rings. PMe3 cleav... |
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.] alpha-Methoxy acrylonitriles, available from aldehydes and ketones, react with sodium azide in the presence of eerie ammonium nitrate to give azido nitrates; from these compounds, alpha-amino acids are obtained by sequential treatment with sodium acetate in acetic acid and then methanolic potassium ... |
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