Reactivity of Ir-NSiN Complexes: Ir-Catalyzed Dehydrogenative Silylation of Carboxylic Acids
作者:Alejandro Julián、Karin Garcés、Ralte Lalrempuia、E. A. Jaseer、Pilar García-Orduña、Francisco J. Fernández-Alvarez、Fernando J. Lahoz、Luis A. Oro
DOI:10.1002/cctc.201701488
日期:2018.3.7
precursor for the preparation of Ir(NSiN) complexes (NSiN=fac‐bis‐(pyridine‐2‐yloxy)methylsilyl). The reaction of [Ir(μ‐Cl)(cod)]2 with bis‐(pyridine‐2‐yloxy)methylsilane enabled the synthesis of [Ir(H)(Cl)(NSiN)(η2‐cod)] with an uncommon η2‐coordination mode for the cod ligand. The application of Ir–NSiN species as catalysts precursors for the dehydrogenativesilylation of carboxylic acids was also explored
Mukaiyama aldol coupling of the second-generation C1C14 (AB) fragment of altohyrtins (spongistatins) with the model α-methyl-β-alkoxyaldehydes revealed that the stereochemistry at the newly formed carbon centers was controlled by the β-alkoxy chiral center of the model aldehydes. The union of the AB fragment with the C15C28 (CD) fragment under the same conditions gave the fully elaborated C1C28 (ABCD)
TESOTf-Induced Rearrangement of Quinols. Efficient Construction of the Fully Functionalized Carbon Skeleton of the Griseusins by a Divergent−Reconvergent Approach
作者:Kathlyn A. Parker、Thomas L. Mindt、Yung-hyo Koh
DOI:10.1021/ol060206q
日期:2006.4.1
key reaction in a model sequence for the total synthesis produced two structurally divergent products, both were converted to the same advanced model intermediate that contains the complete carbon skeleton and (except for the extraneous oxygen substituent in the model series) the functional group pattern of the griseusins.
[反应:见正文] 芳基 C-糖苷全合成的“反向极性”或“umpolung”策略是在抗生素 (-)-griseusin B 的背景下开发的。全合成产生了两种结构不同的产品,两者都被转化为相同的高级模型中间体,其中包含完整的碳骨架和(模型系列中的外来氧取代基)灰色素的官能团模式。
C–H, Si–H and C–F abstraction with an extremely electron poor I(<scp>iii</scp>) reagent
作者:Tania、Marcus Sceney、Jason D. Bennetts、Lachlan Barwise、Keith F. White、Jason L. Dutton
DOI:10.1039/d3dt03266c
日期:——
The recently discovered I(iii) reagent NO2-C6H4-I(OTf)2 is found to rapidly react with hydride sources, including HSiEt3 and relatively hydridic C–H precursors.