- AMINOPEPTIDASE A INHIBITORS AND PHARMACEUTICAL COMPOSITIONS COMPRISING THE SAME
-
The present invention relates to a novel compound, to a composition comprising the same, to methods for preparing the compound, and the use of this compound in therapy. In particular, the present invention relates to compound that is useful in the treatment and prevention of primary and secondary arterial hypertension, ictus, myocardial ischaemia, cardiac and renal insufficiency, myocardial infarction, peripheral vascular disease, diabetic proteinuria, Syndrome X and glaucoma.
- -
-
Page/Page column 119
(2020/06/10)
-
- Method for 2-oxothiazolidine-4-carboxylic acid for cellular glutathione
-
Provided herein is a composition, method of manufacture, and method for treating a disease condition and/or raising cellular levels of glutathione, the composition comprising L-2-oxothiazolidine-4-carboxylate, (procysteine) having a purity of at least 99 to 99.5 percent.
- -
-
Page/Page column 9; 10
(2019/04/15)
-
- Synthesis and characterization of brain penetrant prodrug of neuroprotective D-264: Potential therapeutic application in the treatment of Parkinson's disease
-
Parkinson's disease (PD) is one of the major debilitating neurodegenerative disorders affecting millions of people worldwide. Progressive loss of dopamine neurons resulting in development of motor dysfunction and other related non-motor symptoms is the hallmark of PD. Previously, we have reported on the neuroprotective property of a potent D3 preferring agonist D-264. In our goal to increase the bioavailability of D-264 in the brain, we have synthesized a modified cysteine based prodrug of D-264 and evaluated its potential in crossing the blood-brain barrier. Herein, we report the synthesis of a novel modified cysteine conjugated prodrug of potent neuroprotective D3 preferring agonist D-264 and systematic evaluation of the hydrolysis pattern of the prodrug to yield D-264 at different time intervals in rat plasma and brain homogenates using HPLC analysis. Furthermore, we have also performed in vivo experiments with the prodrug to evaluate its enhanced brain penetration ability.
- Dholkawala, Fahd,Voshavar, Chandrashekhar,Dutta, Aloke K.
-
-
- INTERMEDIATE FOR BIOTIN AND PROCESS FOR PRODUCING THE SAME
-
The present invention is to provide a process for preparing a synthetic intermediate of biotin which is industrially advantageous, and discloses a process for preparing a compound represented by the formula (I) : ???wherein R1 and R2 may be the same or different from each other, and each represents hydrogen atom, a benzyl group which may have a substituent(s) on the benzene ring, a benzhydryl group which may have a substituent(s) on the benzen ring, or a trityl group which may have a substituent(s) on the benzene ring, R3 represents cyano group, carboxyl group, an alkoxycarbonyl group, an alkylthiocarbonyl group, or a carbamoyl group which may have a substituent, or a salt thereof which comprises subjecting a compound represented by the formula (II-a) : ???wherein the symbols have the same meanings as defined above, or a salt thereof to ring transformation.
- -
-
-
- A practical synthesis of (+)-biotin from L-cysteine
-
α-Amino aldehyde 4, which is readily derived from L-cysteine through cyclization and elaboration of the carboxy group, was subjected to the Strecker reaction, which, via sodium bisulfite adduct 16, afforded α-amino nitrile 5 with high diastereose-lectivity (syn/anti = 11:1) and in high yield. Amide 6, derived from 5, was converted to thiolactone 8, a key intermediate in the synthesis of (+)-biotin (1), by a novel S,N-carbonyl migration and cyclization reaction. The Fukuyama coupling reaction of 8 with the zinc reagent 21, which has an ester group, in the presence of a heterogeneous Pd/ C catalyst allowed the efficient installation of the 4-carboxybutyl chain to provide 9. Compound 9 was hydrogenated and the protecting groups removed to furnish 1 in 10 steps and in 34 % overall yield from L-cysteine.
- Seki, Masahiko,Hatsuda, Masanori,Mori, Yoshikazu,Yoshida, Shin-Ichi,Yamada, Shin-Ichi,Shimizu, Toshiaki
-
p. 6102 - 6110
(2007/10/03)
-
- A convenient synthesis of chiral oxazolidin-2-ones and thiazolidin-2-ones and an improved preparation of triphosgene
-
Oxazolidin-2-ones and thiazolidin-2-ones are conveniently prepared by condensation of L-serine, L-threonine and L-cysteine, respectively with triphosgene. The corresponding methyl esters may be subsequently obtained by quenching the reaction mixture with methanol, without prior need for the isolation of the free acids. An improved procedure for preparation of triphosgene using an internal cooling system is described.
- Falb,Nudelman,Hassner
-
p. 2839 - 2844
(2007/10/02)
-
- Total Synthesis of (+)-Latrunculin A, an Ichthyotoxic Metabolite of the Sponge Latrunculia magnifica, and Its C-15 Epimer
-
Latrunculin A (1), an ichthyotoxic metabolite of the sponge Latrunculia magnifica with potent inhibitory action on microfilament-mediated processes involved in cell division, was synthesized via a convergent approach.Construction of a major segment of the latrunculin backbone was accomplished by means of a three-component coupling of aldehyde 24, β-keto ester 27, and phosphonium salt 26, which established the conjugated E,Z-diene moiety of 31.The thiazolidinone subunit of 1 was elaborated in the form of 39 from L-cysteine and was linked to 35 without nitrogen protection.Final lactonization of 47 was carried out using the Mitsunobu protocol.A parallel sequence employing the epimeric seco acid 48 produced 15-epilatrunculin A.
- White, James D.,Kawasaki, Motoji
-
p. 5292 - 5300
(2007/10/02)
-
- A FACILE SYNTHESIS OF 2-OXO-THIAZOLIDINES OF BIOLOGICAL INTEREST.
-
A facile procedure for the preparation in good yield of L-2-oxothiazolidine-4-carboxylic acid and other 2-oxothiazolidines of biological interest is described, involving reaction of suitable aminothiols with 1,1'-carbonyldiimidazole in an organic solvent.
- d'Ischia, M.,Prota, G.,Rotteveel, R. C.,Westerhof, W.
-
p. 1577 - 1586
(2007/10/02)
-
