摘要:
The invention pertains to a new route to prepare β-functionalized carboxylic acid esters in a one-pot reaction, by reacting an olefinic acid ester in the presence of a catalyst system, comprising a Rh(I)-complex, together with an aryl boron or a diamine as nucleophilic compounds, and under oxygen-free conditions and elevated temperatures.
摘要:
Compounds of formula (I): wherein Ar represents an, optionally substituted, aryl or heteroaryl group, R represents an, optionally substituted, aryl or heteroaryl group, an optionally substituted straight or branched chain C1.10-alkyl, R1 is H or methyl, X is an extender group, n is 0 or an integer between 1 and 12 inclusive, A is a polyol residue wherein the unsubstituted polyol from which the residue is derived has at least y OH groups, and y is an integer>1, can easily be prepared, and are useful as synergists in radiation curing.
摘要:
A process for preparing a N-phenylisoxazolidin-5-one derivative is provided. The process for preparing the N-phenylisoxazolidin-5-one derivative comprises reacting an α, β-unsaturated aldehyde with nitrosobenzene in the presence of a N-heterocyclic carbene (NHC) catalyst. A process for preparing an N-alkoxyphenyl protected β-amino acid ester derivative is further provided. The process for preparing the N-alkoxyphenyl protected β-amino acid ester derivative comprises reacting an α, β-unsaturated aldehyde with nitrosobenzene in the presence of a N-heterocyclic carbene (NHC) catalyst to form a N-phenylisoxazolidin-5-one derivative, and then treating the N-phenylisoxazolidin-5-one derivative with an alcohol in the presence of an acid catalyst. A process for preparing an N-alkoxyphenyl protected β-amino acid ester derivative, comprising treating a N-phenylisoxazolidin-5-one derivative with an alcohol in the presence of an acid catalyst, is also provided.
摘要:
The invention provides an industrially advantageous process for the preparation of antimicrobial drugs and industrially advantageous processes for the preparation of intermediates of antimicrobial drugs. Specifically, a process for preparing compounds (VI-a) according to the following reaction scheme; and intermediates therefor: (A)
摘要:
The present invention relates to compounds and pharmaceutically acceptable salts of formula (I) : which are useful in the treatment of metabolic disorders related to insulin resistance or hyperglycemia. These compounds include inhibitors of protein tyrosine phosphatase (PTP-1B) that are useful in the treatment of diabetes and other PTB-1B mediated diseases, such as cancer, neurodegenerative diseases and the like. The compounds of the invention are also useful in pharmaceutical compositions and methods of treating the aforementioned conditions.
摘要:
La présente demande concerne de nouvelles para-phénylènediamines secondaires portant un groupement carboxy, un procédé permettant leur préparation, leur utilisation en coloration d'oxydation capillaire, une composition pour la teinture des fibres kératiniques, et en particulier les fibres kératiniques humaines telles que les cheveux, contenant, dans un milieu approprié pour la teinture, au moins une telle para-phénylènediamine secondaire, un procédé de teinture des fibres kératiniques, l'utilisation de cette composition en coloration capillaire, ainsi qu'un "kit" de teinture.
摘要:
A novel series of substituted quinoxaline 2,3-diones useful as neuroprotective agents are taught. Novel intermediates, processes of preparation, and pharmaceutical compositions contaning the compounds are also taught. The compounds are glutamate antagonists and are useful in the treatment of stroke, cerebral ischemia, or cerebal infarction resulting from thromboembolic or hemorrhagic stroke, cerebral vasospasms, hypoglycemia, cardiac arrest, status epilepticus, perinatal asphyxia, anoxia, Alzheimer's, Parkinson's, and Huntington's diseases.