- Copper(II) triflate catalyzed amination and aziridination of 2-Alkyl substituted 1,3-dicarbonyl compounds
-
A method to prepare α-acyl-β-amino acid and 2,2-diacyl aziridine derivatives efficiently from Cu(OTf)2 + 1,10-phenanthroline (1,10-phen)-catalyzed amination and aziridination of 2-alkyl substituted 1,3-dicarbonyl compounds with PhI=NTs is described. By taking advantage of the orthogonal modes of reactivity of the substrate through slight modification of the reaction conditions, a divergence in product selectivity was observed. In the presence of 1.2 equiv of the iminoiodane, amination of the allylic C-H bond of the enolic form of the substrate, formed in situ through coordination to the Lewis acidic metal catalyst, was found to selectively occur and give the β-aminated adduct. On the other hand, increasing the amount of the nitrogen source from 1.2 to 2-3 equiv was discovered to result in preferential formal aziridination of the C-C bond of the 2-alkyl substituent of the starting material and formation of the aziridine product.
- Ton, Thi My Uyen,Tejo, Ciputra,Tiong, Diane Ling Ying,Chan, Philip Wai Hong
-
experimental part
p. 7344 - 7350
(2012/06/16)
-
- Beta-ketoester compounds
-
The beta-ketoesters of formula I are useful as precursors for organoleptic compounds, especially for flavors, fragrances and masking agents and antimicrobial compounds.
- -
-
Page column 13
(2010/11/30)
-
- Beta-ketoester compounds
-
The beta-ketoesters of formula I are useful as precursors for organoleptic compounds, especially for flavors, fragrances and masking agents and antimicrobial compounds.
- -
-
-
- Synthesis and pharmacology of 3-isoxazolol amino acids as selective antagonists at group I metabotropic glutamic acid receptors
-
Using ibotenic acid (2) as a lead, two series of 3-isoxazolol amino acid ligands for (S)-glutamic acid (Glu, 1) receptors have been developed. Whereas analogues of (RS)-2-amino-3-(3-hydroxy- 5-methyl-4-isoxazolyl)propionic acid [AMPA, (RS)-3] interact sel
- Madsen,Br?uner-Osborne,Frydenvang,Hvene,Johansen,Nielsen,Sánchez,Stensb?l,Bischoff,Krogsgaard-Larsen
-
p. 1051 - 1059
(2007/10/03)
-
- 3-Arylcyclohex-2-en-1-ones and 2,6-Diarylcyclohex-2-en-1-ones. New Liquid Crystalline Compounds
-
The cyclohex-2-en-1-one unit flanked by one or more aryl rings is shown to provide a new system which can exhibit liquid crystal properties; these new mesogens contain a chiral centre which is both adjacent to a lateral dipolar carbonyl group and its also located in the central core.
- Brettle, Roger,Dunmur, David A.,Farrand, Louise D.,Hindley, Nigel J.,Marson, Charles M.
-
p. 1663 - 1666
(2007/10/02)
-