89290-78-8Relevant academic research and scientific papers
Auxiliary accelerated reactions: Towards the use of catalytic chiral auxiliaries
Westwell, Andrew D.,Williams, Jonathan M. J.
, p. 13063 - 13078 (2007/10/03)
In competition experiments, the acceleration of reactivity of alkenes tethered to pyridyl groups compared with the corresponding alkenes tethered to phenyl groups in the presence of transition metals was demonstrated for two reaction types: Diels-Alder cycloaddition of enoate esters and catalytic hydrogenation of allylic and homoallylic ethers. The rate accelerations observed are of crucial importance in the development of a new concept for asymmetric catalysis: chiral auxiliaries which can function in a catalytic manner.
Reactions of Heterocyclic Aromatic Acetals Over γ-Alumina, Aluminium Phosphate and Aluminium Sulphate
Raja, S.,Xavier, N.,Arulraj, S. J.
, p. 916 - 919 (2007/10/02)
Reactions of twelve heterocyclic aromatic acetals (1a-12a) over solid catalysts such as γ-alumina (AL), aluminium phosphate (AP) and aluminium sulphate (AS) have been studied.The reactions of acetals over AL and AP lead to the corresponding ethers, esters and aldehydes, while over AS the products formed are the corresponding esters and aldehydes.The anomalous behaviour of pyrrole-2-aldehyde acetal (10a) and pyridine-2-aldehyde acetal (12a) over catalysts is of particular interest.Probable mechanisms have been suggested for the reactions.
