First Pre-Functionalised Polymeric Aromatic Framework from Mononitrotetrakis(iodophenyl)methane and its Applications
作者:Ester Verde-Sesto、Mercedes Pintado-Sierra、Avelino Corma、Eva M. Maya、Jose G. de la Campa、Marta Iglesias、Felix Sánchez
DOI:10.1002/chem.201304163
日期:2014.4.22
Starting frommononitrotetrakis(iodophenyl)methane as monomer, we report the preparation of the first pre‐functionalised porous aromaticframeworks (PAFs) and their application as supports for organometallic catalysts. Neutral coordinate imino‐pyridine Schiff base (PAF‐NPy) or chiral bis‐amino (PAF‐NPro) ligands were obtained by post‐synthetic treatment of PAF‐NH2 and treated with copper(I) or rhodium(I)
Stereoselective Cyclopropanation Under Solvent Free Conditions: Catalyzed by a Green and Efficient Recyclable Cu-Exchanged Bentonite
作者:Choukry K. Bendeddouche、Mehdi Adjdir、Hadj Benhaoua
DOI:10.2174/1570178613666160109005049
日期:2016.2.10
of carbene generated fromethyl diazoacetate in the presence of a greener Cu-exchanged bentonite catalyst to olefin under solvent free condition. The cyclopropanes were obtained with good yields. Our own contribution in this area was to introduce a modified Algerian bentonite as a catalyst and microwave activation as a mode of heating. Methods: A catalytic material developed from natural type montmorillonite
Cyclopropanation of alkenes with metallocarbenes generated from monocarbonyl iodonium ylides
作者:Tristan Chidley、Graham K. Murphy
DOI:10.1039/c8ob02636j
日期:——
Reacting Wittigreagents and the hypervalent iodine reagent iodosotoluene, in the presence of 10 mol% Cu(tfacac)2 and 5 equiv. of alkene, results in a novel cyclopropanation reaction. The reagent combination is believed to generate a transient monocarbonyliodoniumylide (MCIY) in situ, which can be intercepted by the copper catalyst to give a metallocarbene. Both ester and ketone derived phosphoranes
Semi‐Rationally Designed Short Peptides Self‐Assemble and Bind Hemin to Promote Cyclopropanation
作者:Oleksii Zozulia、Ivan V. Korendovych
DOI:10.1002/anie.201916712
日期:2020.5.18
amyloid assemblies can impart a substantial degree of enantioselectivity without the need for extensive optimization; 3. The ease of peptidepreparation allows for straightforward incorporation of unnatural aminoacids and preparation of peptides made of D-amino acids with complete reversal of enantioselectivity.
Cu and Au Metal-Organic Frameworks Bridge the Gap between Homogeneous and Heterogeneous Catalysts for Alkene Cyclopropanation Reactions
作者:Avelino Corma、Marta Iglesias、Francesc X. Llabrés i Xamena、Félix Sánchez
DOI:10.1002/chem.201000278
日期:2010.8.23
The copper and gold metal–organicframeworks (MOFs) [Cu3(BTC)2(H2O)3]n, [Cu3(BTC)2] (BTC=benzene‐1,3,5‐tricarboxylate), and IRMOF‐3‐SI‐Au are active and reusable solid catalysts for the cyclopropanation of alkenes with high chemo‐ and diastereoselectivities. This type of material gives better results than previous solid catalysts while working together with the homogeneouscatalysts. These MOFs can help