AMINO-5-[4-(DIFLUOROMETHOXY)PHENYL]-5-PHENYLIMIDAZOLONE COMPOUNDS FOR THE INHIBITION OF BETA-SECRETASE
申请人:Malamas Michael Sotirios
公开号:US20090048320A1
公开(公告)日:2009-02-19
The present invention provides compounds and methods for the use thereof to inhibit β-secretase (BACE) and treat β-amyloid deposits and neurofibrillary tangles.
This invention aims at providing a catalyst for producing an optically active aldehyde or an optically active ketone, which is an optically active carbonyl compound, by carrying out selective asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, particularly a catalyst which is insoluble in a reaction mixture for obtaining optically active citronellal which is useful as a flavor or fragrance, by carrying out selective asymmetric hydrogenation of citral, geranial or neral; and a method for producing a corresponding optically active carbonyl compound. The invention relates to a catalyst for asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, which comprises a powder of at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table, or a metal-supported substance in which at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table is supported on a support, an optically active cyclic nitrogen-containing compound and an acid.
[EN] PRECURSORS AND PROCESS FOR THE PRODUCTION OF 18F-LABELLED AMINO ACIDS<br/>[FR] PRÉCURSEURS ET PROCÉDÉ POUR LA PRODUCTION D'ACIDES AMINÉS MARQUÉS PAR 18F
申请人:ABX ADVANCED BIOCHEMICAL COMPOUNDS
公开号:WO2014095739A1
公开(公告)日:2014-06-26
The invention relates to precursors for the production of optically active 18F-labelled amino acids bearing the radiochemical label on an aromatic ring, in particular 6-[18F]Fluoro-3,4- dihydroxy-L-phenylalanine ([18F]-L-DOPA) as well as meta- and para-[18F]Fluoro-L- tyrosine. Further, it relates to a radiochemical method for the production of the corresponding radiotracers.
Herstellung enantiomerenreiner<i>cis</i>- oder<i>trans</i>-konfigurierter 2-(<i>tert</i>-Butyl)-3-methylimidazolidin-4-one aus den Aminosäuren (<i>S</i>)-Alanin, (<i>S</i>)-Phenylalanin, (<i>R</i>)-Phenylglycin, (<i>S</i>)-Methionin und (<i>S</i>)-Valin
作者:Reto Naef、Dieter Seebach
DOI:10.1002/hlca.19850680117
日期:1985.2.13
Preparation of the Enantiomerically Pure cis- and trans-Configurated 2-(tert-Butyl)-3-methylimidazolidin-4-ones from the Amino Acids (S)-Alanine, (S)-Phenylalanine, (R)-Phenylglycine, (S)-Methionine, and (S)-Valine
Efficient construction of highly functionalized pyrrolo[1,2- c ]imidazol-1-ones via a regioselective 1,3-dipolar cycloaddition of imidazolidin-4-ones, aldehydes, and nitroalkenes in one pot
作者:Xia Zhang、Xiaoyan Wang、Yanyang He、Ying Liu、Jie Liu、Jianyou Shi
DOI:10.1016/j.tetlet.2016.01.103
日期:2016.3
A series of novel pyrrolo[1,2-c]imidazol-1-ones were efficiently synthesized via a three-component, regioselective 1,3-dipolarcycloadditionreaction. The azomethine ylides generated in situ from imidazolidin-4-ones and aldehydes reacted with the nitroalkenes to yield the novel pyrrolo[1,2-c]imidazol-1-one derivatives with multiple stereogenic centers in moderate to high yields (up to 99%) and in high
通过三组分,区域选择性的1,3-偶极环加成反应有效地合成了一系列新型的吡咯并[1,2 - c ]咪唑-1-酮。由咪唑啉丁-4-酮和醛原位生成的甲亚胺基亚烷基与硝基烯烃反应,以中等至高产率(高达99%)生成具有多个立体中心的新型吡咯并[1,2 - c ]咪唑-1-酮衍生物)和高非对映选择性(最高达98:2)。环加合物的结构和相对立体化学通过1 H NMR谱和X射线晶体学证实。