17322-77-9Relevant academic research and scientific papers
Novel, air-stable, lanthanide catalysts for the hetero Diels-Alder reaction
Spino, Claude,Clouston, Laurel,Berg, David
, p. 1762 - 1764 (1996)
Novel, air-stable, yttrium and ytterbium complexes were found effective in the catalysis of the typical hetero Diels-Alder reaction of crotonaldehyde and ethylvinyl ether. They represent an attractive solution to the problem of ligand lability in the realm of lanthanide catalysts.
Oxidative rearrangement of 2-alkoxy-3,4-dihydro-2H-pyrans: stereocontrolled synthesis of 4,5-cis-disubstituted tetrahydrofuranones including whisky and cognac lactones and crobarbatic acid
Armstrong, Alan,Ashraff, Cassim,Chung, Hunsuk,Murtagh, Lorraine
experimental part, p. 4490 - 4504 (2009/10/09)
Oxidation of 2-alkoxy-3,4-dihydro-2H-pyrans 3 with dimethyldioxirane or MTO/urea-H2O2 followed by Jones oxidation leads to rearrangement and stereocontrolled formation of 4,5-cis-disubstituted tetrahydrofuranones. The method is applied to the synthesis of the whisky lactone 9, cognac lactone 10 and crobarbatic acid 17.
Lanthanide catalysts for the hetero Diels-Alder reaction: Effect of ligand structure and acidity
Spine,Clouston,Berg
, p. 1047 - 1054 (2007/10/03)
A series of yttrium, ytterbium, and lanthanum hexa- or heptacoordinate complexes were prepared and their catalytic activities tested in the hetero Diels-Alder reaction between crotonaldehyde and ethyl vinyl ether. It was found that a pKa below
LANTHANIDE CATALYSIS OF CYCLOADDITIONS OF HETERODIENES WITH ENOL ETHERS
Danishefsky, Samuel,Bednarski, Mark
, p. 721 - 724 (2007/10/02)
The cycloadditions of enol ethers with α,β-unsaturated aldehydes is catalysed by Yb(fod)3.
