Synthesis and Application of Stereoretentive Ruthenium Catalysts on the Basis of the M7 and the Ru–Benzylidene–Oxazinone Design
作者:Adrien Dumas、Daniel S. Müller、Idriss Curbet、Loïc Toupet、Mathieu Rouen、Olivier Baslé、Marc Mauduit
DOI:10.1021/acs.organomet.7b00836
日期:2018.3.12
catalysts bearing the dithiocatecholate ligand was synthesiszed on the basis of the M7 and Ru–benzylidene–oxazinone design. The activity of the catalysts was tested in ring-opening cross-metathesisreactions, ring-closing metathesis reactions, cross-metathesisreactions, and self-metathesis reactions using Z- and E-configured starting materials. The desired metathesis products were obtained with moderate to
Catalytic Nucleophilic Allylation Driven by the Water–Gas Shift Reaction
作者:Scott E. Denmark、Zachery D. Matesich、Son T. Nguyen、Selena Milicevic Sephton
DOI:10.1021/acs.joc.7b02658
日期:2018.1.5
of this reactionfrom the initial serendipitous discovery to its general synthetic scope is detailed, highlighting the roles of water, CO, and amine in the generation of a more complete catalytic cycle. The use of unsymmetrical allylic pro-nucleophiles was shown to give preferential product formation through the modulation of reaction conditions. Both (E)-cinnamyl acetate and vinyl oxirane were efficiently
钌与烯丙基亲核试剂的醛催化烯丙基化已被证明是在温和条件下形成碳-碳键的有效方法。此反应从最初的偶然发现到其一般合成范围的演变过程都进行了详细介绍,突出了水,一氧化碳和胺在更完整的催化循环生成中的作用。结果表明,使用不对称的烯丙基亲核亲核试剂可以通过调节反应条件来优先形成产物。(E)-肉桂酸乙酸酯和乙烯基环氧乙烷均有效地用于形成抗支链产物(抗/ syn最高> 20:1 )和E-线性产物(最高> 20:1 E / s )Z)分别与芳香族,α,β-不饱和和脂肪族醛形成高选择性。强调了使反应对映选择性的尝试,包括对苯甲醛高达75:25的对映富集。
[EN] CATALYSTS FOR EFFICIENT Z-SELECTIVE METATHESIS<br/>[FR] CATALYSEURS POUR UNE MÉTATHÈSE Z-SÉLECTIVE EFFICACE
申请人:TRUSTEES BOSTON COLLEGE
公开号:WO2014201300A1
公开(公告)日:2014-12-18
The present application provides, among other things, compounds and methods for metathesis reactions. In some embodiments, provided compounds promote highly efficient and highly Z-selective metathesis. In some embodiments, provided compounds and methods are particularly useful for producing allyl alcohols. In some embodiments, provided compounds have the structure of formula I. In some embodiments, provided compounds comprise ruthenium, and a ligand bonded to ruthenium through a sulfur atom.
Stereoselective Synthesis of 1,3-Amino Alcohols by the Pd-Catalyzed Cyclization of Trichloroacetimidates
作者:Yuanzhen Xie、Kai Yu、Zhenhua Gu
DOI:10.1021/jo402681z
日期:2014.2.7
The synthesis of 4-vinyl-5,6-dihydro-1,3-oxazines, precursors of 1,3-aminoalcohols, using the palladium-catalyzed cyclization of trichloroacetimidates is reported. The reaction favors the formation of the 4,6-cis-isomers with up to >20:1 diastereoselectivity. Chemoselective hydrolysis of the resulting 5,6-dihydro-1,3-oxazines was also investigated.
Allylic-type diindium reagents were prepared from 3-bromo-1-iodopropene (1a), 3-bromo-1-iodo-1-phenylpropene (1b), or 2,4-diiodobut-2-en-1-ol (1c) with metallic indium, and their successive coupling with electrophiles was examined. The coupling behavior of the diindium reagents was found to depend on the electrophiles and the substituent on the diindium compounds.