131288-67-0Relevant articles and documents
Highly enriched mixtures of methohexital stereoisomers by palladium-catalyzed allylation and their anaesthetic activity
Brunner, Henri,Ittner, Karl-Peter,Lunz, Dirk,Schmatloch, Stefan,Schmidt, Thomas,Zabel, Manfred
, p. 855 - 862 (2003)
The stereoselective Pd-catalyzed allylation of MBA [5-(2′-hex-3′-yny1)-1-methylbarbituric acid] gives the commercial injection narcotic methohexital, which exists as four isomers: two diastereomeric pairs of enantiomers. The isomer composition produced depends on three stereochemical parameters: catalyst control, substrate control, and kinetic resolution. Judicious choice of these parameters allowed the synthesis of methohexital samples with greatly differing isomer compositions, and these samples were investigated with respect to their anaesthetic doses in rats. Some isomer compositions obtained were much more active than the commercially used drug and showed fewer side effects. As a consequence of the determination of the absolute configuration of the methohexital (SbRh) isomer, the unknown configuration of the trade product, the so-called α-racemate, can be established as (RbSh) and (SbRh). ( Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003).
CYCLIC AMINE BASE-1 INHIBITORS HAVING A HETEROCYCLIC SUBSTITUENT
-
Page/Page column 46, (2008/06/13)
Disclosed are novel compounds of the formula (I)or a pharmaceutically acceptable salt or solvate thereof, wherein R1 is formula (I) X is -0-, -C(R14)2- or -N(R)-; Z is -C(R14)2- or -N(R)-; t is 0, 1, 2 or 3; each R and R2 is independently H, alkyl, cycloalkyl, cycloalkylalkyl, aryl, heteroaryl, heterocycloalkyl, arylalkyl, heteroarylalkyl, heterocycloalkylalkyl, alkenyl or alkynyl; each R14 is H, alkyl, alkenyl, alkynyl, halo, -CN, haloalkyl, cycloalkyl, cycloalkylalkyl, aryl, heteroaryl, heterocycloalkyl, arylalkyl, heteroarylalkyl, heterocycloalkylalkyl, -OR35, -N(R24)(R25)or -SR35; R41 is alkyl, cycloalkyl, -S02(alkyl), -C(O)-alkyl, -C(O)-cycloalkyl or -alkyl-NH-C(O)CH3; and the remaining variables are as defined in the specification. Also disclosed are pharmaceutical compositions comprising the compounds of formula I and methods of treating cognitive or neurodegenerative diseases with compounds of formula (I). Also disclosed are pharmaceutical compositions and methods of treatment comprising compounds of formula I in combination with other agents useful in treating cognitive or neurodegenerative diseases.
Large scale synthesis of optically pure aziridines
-
, (2008/06/13)
Disclosed is an efficient, inexpensive method for the preparation of chiral aziridines on a large scale.