387877-78-3Relevant academic research and scientific papers
A New Approach to Non-Coordinating Anions: Lewis Acid Enhancement of Porphyrin Metal Centers in a Zwitterionic Metal-Organic Framework
Johnson, Jacob A.,Petersen, Brenna M.,Kormos, Attila,Echeverría, Elena,Chen, Yu-Sheng,Zhang, Jian
supporting information, p. 10293 - 10298 (2016/09/03)
We describe a new strategy to generate non-coordinating anions using zwitterionic metal-organic frameworks (MOFs). By assembly of anionic inorganic secondary building blocks (SBUs) ([In(CO2)4]-) with cationic metalloporphyrin-based organic linkers, we prepared zwitterionic MOFs in which the complete internal charge separation effectively prevents the potential binding of the counteranion to the cationic metal center. We demonstrate the enhanced Lewis acidity of MnIII- and FeIII-porphyrins in the zwitterionic MOFs in three representative electrocyclization reactions: [2 + 1] cycloisomerization of enynes, [3 + 2] cycloaddition of aziridines and alkenes, and [4 + 2] hetero-Diels-Alder cycloaddition of aldehydes with dienes. This work paves a new way to design functional MOFs for tunable chemical catalysis.
Enantioselective IrI-catalyzed carbocyclization of 1,6-enynes by the chiral counterion strategy
Barbazanges, Marion,Auge, Mylene,Moussa, Jamal,Amouri, Hani,Aubert, Corinne,Desmarets, Christophe,Fensterbank, Louis,Gandon, Vincent,Malacria, Max,Ollivier, Cyril
, p. 13789 - 13794 (2012/01/06)
Enantioenriched bicyclo[4.1.0]hept-2-enes were synthesized by Ir I-catalyzed carbocyclization of 1,6-enynes. No chiral ligands were used, CO and PPh3 were the only ligands bound to iridium. Instead, the stereochemical information was
Synthesis of cyclic allyl vinyl ethers using Pt(II)-catalyzed isomerization of oxo-alkynes
Wang, Zezhou,Lin, Xi,Luck, Rudy L.,Gibbons, Garrett,Fang, Shiyue
supporting information; experimental part, p. 2643 - 2648 (2009/06/20)
Several alkynyl epoxides and one alkynyl allyl alcohol were isomerized to cyclic allyl vinyl ethers (3,4-dihydro-2H-1,4-oxazines) using PtCl2 as the catalyst. Three of these allyl vinyl ethers were converted to 2-hydroxymorpholine derivatives b
Effects of substituents on the multiple bonds on ring-closing metathesis of enynes
Kitamura, Tsuyoshi,Sato, Yoshihiro,Mori, Miwako
, p. 678 - 693 (2007/10/03)
In ring-closing metathesis (RCM) reactions of enynes, the substituents on the multiple bonds are quite important. Although RCM of an enyne having a monosubstituted alkene proceeds smoothly using the first-generation ruthenium-carbene complex 1a, that of a
