摘要:
The present invention relates to a process for reacting α·aminoaldehyde derivatives having a sterically bulky amino group which are commercially available with a metal cyanide in the presence of an acid chloride, an acid anhydride or with an organic cyanide in the presence of a Lewis acid to synthesize 3-amino-2-hydroxybutyronitrile derivatives in high yields and high erythro selectivity. When optically active α·aminoaldehyde derivatives are used, racemization hardly occurs during the reaction, and the desired products are obtained in high optical purity.
摘要:
Verfahren zur Racemattrennung von Phenylacetonitrilen der Formel (I), worin R , R , R und n die in der Beschreibung angegebene Bedeutung besitzen. Das Verfahren besteht darin, dass man die Racemate (I) in einem polaren Lösungsmittel löst, 0,5 bis 1,0 Mol optisch aktiver Camphersulfonsäure pro Mol Verbindung (I) zugibt, auf 40 bis 100 DEG C erwärmt, abkühlen lässt und aus dem so erhaltenen Salz das optisch aktive Phenylacetonitril (I) freisetzt.
摘要:
The present invention provides novel HIV protease inhibitors of formula I, pharmaceutical formulations containing those compounds and methods of treating and/or preventing HIV infection and/or AIDS.
wherein the substituents are as defined in the description.
R1 est un radical hétéroaryle ou est phényle éventuellement mono, di ou tri-substitué, R2 est alkyle, R3 et R4 sont l'hydrogène ou des radicaux alkyle inférieur sans toutefois représenter tous deux l'hydrogène, R5 est un hétéroaryle ou est un radical phényle éventuellement mono, di ou tri-substitué, Q est éthylène-1,2-diyle ou un groupe cyclopropane-1,2-diyle, et leurs sels d'addition avec des acides. Médicament comprenant une éthylamine (I), destiné notamment au traitement des affections neurologiques et/ou psychiques.
摘要:
Hair tonics containing as the active ingredient phenylacetonitrile derivatives represented by the general formula (I) or pharmaceutically acceptable salts thereof: (I) [wherein R and R are each hydrogen, C1-10 alkyl, C2-10 alkenyl, or C2-10 acyl, or NR R may be a 3- to 7-membered heterocycle; R is C1-5 alkyl; and R , R , and R are each hydrogen or C1-4 alkoxy]. The hair tonics of the invention are efficacious in accelerating the growth of human hair and in inhibiting and preventing hair loss by virtue of the specific phenylacetonitrile derivatives contained therein as the active ingredient.
摘要:
The invention relates to novel phenyl-substituted 2-enamino-keto nitriles of formula (I), wherein Ar, X, Z, Y and K have the meanings as cited in the description. The invention also relates to several methods for producing said phenyl-substituted 2-enamino-keto nitriles, and to their use as herbicides and pesticides.
摘要:
Process for the preparation of a diastereomerically enriched phenylglycine amide derivative in which an enantiomerically enriched phenylglycine amide is converted into the corresponding Schiff base with the aid of compound R2-C(O)-R3, and the Schiff base obtained is subsequently converted into the diastereomerically enriched phenylglycine amide derivative with the aid of a cyanide source, a reducing agent or an allyl organometallic compound. The phenylglycine amide derivatives obtained are interesting starting materials for the preparation of for example enantiomerically enriched α- and/or β-amino acids and derivatives thereof, such as amides and esters, and amines.