摘要:
The present invention relates to azirine containing compounds useful as anti-angiogenesis agents and preparation thereof. Particularly the present invention relates to azirine containing compounds of formula I, Formula I wherein R1, R2 and R3 are same as defined in the description. The compounds of the present invention are with asymmetric centers this, they are mixture of enantiomers and mixture of diastereomers in some cases. The present invention includes the individual enantiomers and diastereomeric forms of the compound formula I besides the mixtures thereof.
摘要:
A novel heterogeneous liquid phase catalytic process for dehydration of monoethanolamine to ethylenimine and water has been discovered. The process utilizes a novel catalyst made by modifying a cation exchange resin in the hydrogen ion form. The process using the catalyst is performed in a solution of monoethanolamine in a solvent.
摘要:
Chiral synthesis from an achiral starting material by chiral diamine-mediated, such as sparteine-mediated, intermolecular asymmetric alkylation with a strained cyclic ether in the presence of a Lewis acid.
摘要:
There is provided a series of substituted oxime-containing acyl guanidines of Formula (I) or a stereoisomer; or a nontoxic pharmaceutically acceptable salt thereof, wherein R1, R2, R3, R4, R5, R6, and R7 are as defined herein, their pharmaceutical compositions and methods of use. These compounds inhibit the processing of amyloid precursor protein (APP) by β-secretase and, more specifically, inhibit the production of Aβ-peptide. The present disclosure is directed to compounds useful in the treatment of neurological disorders related to β-amyloid production, such as Alzheimer's disease and other conditions affected by anti-amyloid activity.
摘要:
This invention relates to compounds of Formula I having an aziridine-2-carboxylic group and a menthol group, a process for preparing such compounds, a method for obtaining optically active aziridine-2-carboxylate derivatives by optical resolution of such compounds, and optically active aziridine-2-carboxylate derivatives obtained by the same method: wherein R1 is hydrogen; alkyl; cycloalkyl; 4-chlorophenyl; 4-methoxyphenyl; s-triazinyl or pyridinyl acyl; benzyl; hydrocarbon residue which may be substituted with a substituent selected from the group consisting of hydroxy, alkoxy, dialkylamino, phenyl, 4-chlorophenyl and 4-methoxyphenyl; 2,4-dimethoxyphenyl; substituted phenyl including (1R)-phenylethyl or (1S)-phenylethyl. Preferences are given to (1R)-phenylethyl and (1S)-phenylethyl. Menthol is selected from the group consisting of (+)-menthol and (−)-menthol.
摘要:
A sphingomyelin analog represented by the following formula wherein R1 is C1-20 alkyl group, R2 is C1-20 alkyl group, aryl group or C1-6 alkyl group substituted by aryl group, and Z is photoaffinity-labeled group, or its optically active compound.
摘要:
Metal-ligand complexes, including cobalt-ligand complexes, such as a cobalt-porphyrin complex, and their use as catalysts in the cyclization of alkenes.
摘要:
There is disclosed a cross-linked hyaluronate compound obtained by reacting a sodium hyaluronate compound with a polfunctional aziridine compound as a cross-linking agent. The polyfunctional aziridine compound was added to hyaluronan of various molecular weights in an equivalent ratio of HA/AZ of 1:1 to 1:10, preferably, 1:3 to 1:10, more preferably, 1:3 to 1:5; most preferably 1:4 to 1:5. The polymeric hydrogel compounds obtained are useful to prevent the formation of post-operative adhesions, designing tissue engineering applications, and the like.
摘要:
The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time to, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t1>t0, where t1−t0 is greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.