91881-11-7Relevant articles and documents
Lanthanide-Induced Shift Investigation of α-Alkoxy Aldehydes. A Spectroscopic Search for Evidence of Chelation in the Lewis Acid Catalyzed Hetero Diels-Alder Reaction
Midland, Mark M.,Koops, Roger W.
, p. 4647 - 4650 (2007/10/02)
Lanthanide-induced shift studies were performed using a chiral lanthanide shift reagent Eu(hfc)3.Simple ethers exhibited little complexation to the shift reagent.Simple aldehydes produced large lanthanide-induced shifts.The α-alkoxy aldehydes gave lanthanide-induced shifts consistent with contributions from a "chelated" species.The degree of chelation was dependent on the steric bulk of the alkyl side chain.