56300-87-9Relevant academic research and scientific papers
External chiral ligand-mediated enantioselective peterson reaction of α-trimethylsilanylacetate with substituted cyclohexanones
Iguchi, Mayu,Tomioka, Kiyoshi
, p. 4329 - 4331 (2007/10/03)
(equationpresented) The asymmetric Peterson reaction of an α-trimethylsilanylacetate with 4-substituted and 3,5-disubstituted cyclohexanones was mediated by an external chiral tridentate ligand to give the corresponding olefins with an axial chirality in
Asymmetric Wittig reaction of chiral arsonium ylides - I. Asymmetric olefination of 4-substituted cyclohexanones
Dai, Wei-Min,Wu, Jinlong,Huang, Xian
, p. 1979 - 1982 (2007/10/03)
Asymmetric Wittig-type olefination of 4-substituted cyclohexanones with chiral ligand-modified stable arsonium ylides has been examined. The 8-phenylmenthol-derived chiral arsonium ylide of 4 reacted with prochiral ketones 9a-d at -15°C to give the 4-substituted cyclohexylideneacetates 11a-d in 58-69% yield and in up to 80% diastereomeric excess (de).
The asymmetric Horner-Emmons reaction using a benzopyrano-isoxazolidine auxiliary
Abiko, Atsushi,Masamune, Satoru
, p. 1077 - 1080 (2007/10/03)
The asymmetric Horner-Emmons reaction of the phosphonate derived from a chiral benzopyrano-isoxazolidine (with 4-substituted cyclohexanones) proceeded in high diastereoselectivity with the aid of KHMDS and 18-crown-6 ether. Enantiomerically pure, axially dissymmetric cyclohexylidene alcohols, aldehydes and ketones were obtained from the diastereomerically pure Horner-Emmons products in a single step.
