69150-45-4Relevant articles and documents
ANESTHETIC COMPOUNDS
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Page/Page column 43, (2008/06/13)
In one embodiment the invention provides novel compounds of Formula (I) as well as prodrugs, salts, hydrates, solvates and N-oxides thereof. The invention also provides pharmaceutical compositions that include such compounds as well as methods for making and methods for using such compounds in medical therapy.
New chiral ammonium salt hosts derived from amino acids: Very efficient optical resolution of 2,2′-dihydroxy-1,1′-binaphthyl by complexation with these host compounds
Toda, Fumio,Tanaka, Kenya
, p. 1087 - 1088 (2007/10/03)
Chiral ammonium salt hosts are prepared from amino acids by transformation of their NH2 and CO2H groups into Me3N+Br- and CH2OH groups, respectively, via three simple reaction steps; by complexation with these hosts, 2,2′-dihydroxy-1,1′-binaphthyl is resolved very efficiently.
Chiral (β-Aminoalkyl)phosphines. Highly Efficient Phosphine Ligands for Catalytic Asymmetric Grignard Cross-Coupling
Hayashi, Tamio,Konishi, Mitsuo,Fukushima, Motoo,Kanehira, Koichi,Hioki, Takeshi,Kumada, Makoto
, p. 2195 - 2202 (2007/10/02)
New chiral (β-aminoalkyl)phosphines, RCH(NMe2)CH2PPh2 , were prepared by starting with optically active amino acids.The phosphines were used as ligands for nickel-catalyzed asymmetric cross-coupling of 1-arylethyl Grignard reagents (ArMeCHMgCl) with vinyl bromide.Coupling products of over 70percent enantiomeric excess (ee) were obtained in the reaction with the ligand Phephos, Valphos, Ilephos, PhGlyphos, ChGlyphos, or t-Leuphos.A mechanism involving complexation of the magnesium atom in the Grignard reagent with the amino group on the (β-aminoalkyl)phosphine ligand is proposed to account for the high stereoselectivity.The asymmetric cross-coupling was applied to the synthesis of optically active 2-arylpropionic acids.
