415678-38-5Relevant academic research and scientific papers
Preparation and structures of 2-substituted 5-benzyl-3-methylimidazolidin- 4-one-derived iminium salts, reactive intermediates in organocatalytic transformations involving α,β-unsaturated aldehydes
Gro?elj, Uro?,Beck, Albert,Schweizer, W. Bernd,Seebach, Dieter
, p. 751 - 796 (2014/07/07)
Preparations of the title compounds, 5-7 (Scheme 1 and Table 1), of their ammonium salts, 9-11 (Scheme 2 and Table 2), and of the corresponding cinnamaldehyde-derived iminium salts 12-14 (Scheme 3 and Table 3) are reported. The X-ray crystal structures of 15 cinnamyliminium PF6 salts have been determined (Table 4). Selected 1H-NMR data (Table 5) of the ammonium and iminium salts are discussed, and structures in solution are compared with those in the solid state. Copyright
Enantioselective transformation of alpha,beta-unsaturated ketones using chiral organic catalysts
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Page/Page column 10, (2008/06/13)
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of α,β-unsaturated ketones. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA) or (IIB) or are acid addition salts thereof, wherein, in one preferred embodiment, R1 is C1-C6 alkyl, R2is phenyl or 2-methylfuryl, R3 and R4 are hydrogen, and R5 is phenyl optionally substituted with 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C1-C6 alkyl The chiral imidazolidinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.
