Improved enzymatic syntheses of valuable β-arylalkyl-β-amino acid enantiomers
作者:Gábor Tasnádi、Enikő Forró、Ferenc Fülöp
DOI:10.1039/b920731g
日期:——
hydrolyses of β-amino esters with H2O (0.5 equiv.) in t-BuOMe or in i-Pr2O at 45 °C are described. The enantiomers of biologically relevant β-arylalkyl-substituted β-amino acids, and especially (R)-3-amino-3-(2,4,5-trifluorophenyl)butanoic acid, the intermediate of the new antidiabetic drug sitagliptine, were prepared with high enantiomeric excesses (ee≥96%) and in good yields (≥42%).
Efficient Synthesis of γ,δ-Alkynyl-β-amino Acid Derivatives by a New Copper-Catalyzed Amine-Alkyne-Alkyne Addition Reaction
作者:Lei Zhou、Huan-feng Jiang、Chao-Jun Li
DOI:10.1002/adsc.200800447
日期:2008.10.6
A simple and efficientmethod for the synthesis of γ,δ-alkynyl-β-aminoacidderivatives by a new copper-catalyzed amines-alkynes-alkynes addition was developed. Various γ,δ-alkynyl-β-aminoacidderivatives were obtained in moderate to good yields in one step.
Copper-Catalyzed Amine-Alkyne-Alkyne Addition Reaction: An Efficient Method For the Synthesis of γ,δ-Alkynyl-β-amino Acid Derivatives
作者:Lei Zhou、Qi Shuai、Huan-feng Jiang、Chao-Jun Li
DOI:10.1002/chem.200901416
日期:2009.11.2
A simple and efficient method for the synthesis of γ,δ‐alkynyl‐β‐amino acid derivatives by a copper‐catalyzed three‐component amine–alkyne–alkyne addition reaction was developed. Various γ,δ‐alkynyl‐β‐amino acid derivatives were synthesized in moderate to good yields in one step. With chiral prolinol derivatives employed as the amine component, excellent diastereoselectivities (up to >99:1 diastereomeric
There are provided compounds having a superior PHD2 inhibitory effect that are represented by general formula (I′):
(in the above-mentioned general formula (I′),
W, Y, R
2
, R
3
, R
4
, and Y
4
are as described hereinabove), or pharmaceutically acceptable salts thereof.
GABA-uptake inhibitors: construction of a general pharmacophore model and successful prediction of a new representative
作者:Victor N'Goka、Gilbert Schlewer、Jean Michel Linget、Jean Pierre Chambon、Camille Georges Wermuth
DOI:10.1021/jm00112a032
日期:1991.8
A model for the pharmacophore of GABA-uptake inhibitors was established using published structure-activity data and molecular modeling. The model accounted for the activities of different classes of GABA-uptake inhibitors. Analogues of guvacine substituted at position 6 were synthesized in order to confirm the model. 6-(3,3-Diphenylpropyl)guvacine (30f), which fit well with the pharmacophore, had an in vitro IC50 of 0.1-mu-M. This value is as good as those of the best GABA-uptake inhibitors known today.