70203-04-2Relevant articles and documents
Electrophilic Iron Catalyst Paired with a Lithium Cation Enables Selective Functionalization of Non-Activated Aliphatic C?H Bonds via Metallocarbene Intermediates
Hernán-Gómez, Alberto,Rodríguez, Mònica,Parella, Teodor,Costas, Miquel
supporting information, p. 13904 - 13911 (2019/08/30)
Combining an electrophilic iron complex [Fe(Fpda)(THF)]2 (3) [Fpda=N,N′-bis(pentafluorophenyl)-o-phenylenediamide] with the pre-activation of α-alkyl-substituted α-diazoesters reagents by LiAl(ORF)4 [ORF=(OC(CF3)3] provides unprecedented access to selective iron-catalyzed intramolecular functionalization of strong alkyl C(sp3)?H bonds. Reactions occur at 25 °C via α-alkyl-metallocarbene intermediates, and with activity/selectivity levels similar to those of rhodium carboxylate catalysts. Mechanistic investigations reveal a crucial role of the lithium cation in the rate-determining formation of the electrophilic iron-carbene intermediate, which then proceeds by concerted insertion into the C?H bond.
Synthesis and pharmacology of 3-isoxazolol amino acids as selective antagonists at group I metabotropic glutamic acid receptors
Madsen,Br?uner-Osborne,Frydenvang,Hvene,Johansen,Nielsen,Sánchez,Stensb?l,Bischoff,Krogsgaard-Larsen
, p. 1051 - 1059 (2007/10/03)
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
Process for the preparation of pure alkyl alkylacetoacetates
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, (2008/06/13)
A process for the purification of alkyl alkylacetoacetates of the general formula: STR1 in which R1 is a C1 -C10 -alkyl group and R2 is a C1 -C4 -alkyl group. In the process, an alkyl alkylacetoacetate which contains an alkyl alkenylacetoacetate of the general formula: STR2 in which R1 and R2 have the above-stated meaning, and/or further by-products as an impurity, is converted with an ester of the general formula: STR3 in which R2 has the above-stated meaning, in the presence of a base, into an intermediate which is separated off.