Biswas, Animesh published the artcileAcyl Donor Intermediates in N-Heterocyclic Carbene Catalysis: Acyl Azolium or Azolium Enolate?, Recommanded Product: Benzyl acetate, the main research area is acyl azolium enolate intermediate nitrogen heterocyclic carbene reaction mechanism; N-heterocyclic carbenes; X-ray diffraction; esters; reaction mechanisms; structure elucidation.
Azolium enolates and acyl azolium cations have been proposed as intermediates in numerous N-heterocyclic carbene (NHC) catalyzed transformations. Acetyl azolium enolates were generated from the reaction of 2-propenyl acetate with both saturated (SIPr) and aromatic (IPr) NHCs, isolated, and characterized (NMR, XRD). Protonation with triflic acid gave the corresponding acetyl azolium triflates which were isolated and characterized (NMR, XRD). Acyl azolium cations have been proposed as immediate precursors of the ester product, for example, in the redox esterification of α,β-enals. Studies with d3-acetyl azolium triflate suggest that ester formation originates instead from an azolium enolate intermediate. Furthermore, the acetyl azolium enolate selectively reacted with alc. nucleophiles in the presence of amines. While the acetyl azolium cation did not react with alcs., an ester-selective reaction was induced by addition of base, by intermediate formation of the acetyl azolium enolate.
Angewandte Chemie, International Edition published new progress about Amidation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics