Formation of δ-Lactones by Cyanide Catalyzed Rearrangement of α-Hydroxy-β-oxoesters
作者:David Kieslich、Jens Christoffers
DOI:10.1021/acs.orglett.0c04157
日期:2021.2.5
δ-Valerolactone derivatives are formed by cyanide-catalyzed ring-transformation of cyclic α-hydroxy-β-oxoesters. This unprecedented reaction defines a new synthetic methodology, and the products are obtained in up to quantitative yields. Several alkyl substitutions as well as different ester residues are tolerated. Furthermore, benzo- and heteroarene-annulated starting materials are converted without
Imidazo-pyrimidone Compounds, and Preparation Method and Application Thereof
申请人:Nanjing Gator Meditech Company, Ltd.
公开号:US20180141946A1
公开(公告)日:2018-05-24
Compounds of formula (I), imidazopyrimidine ketones, as well as preparations and applications thereof. Compounds and pharmaceutically acceptable salts thereof which stimulate the body to produce tumor necrosis factor-related apoptosis-inducing ligands, while avoiding the drawbacks of existing cancer treatments based on recombinant proteins and antibodies. Thus, they can provide novel options for the treatment of related tumors.
Bi(NO3)3-catalyzed ring expansion of five-membered ring 1,4-diketones in the presence of primary amines leads to eight-memberedringlactams. When applied to starting materials with a tetrahydrothiophene or pyrrolidine moiety, tetrahydro-2H-1,4-thiazocin-3-ones and hexahydro-1,4-diazocin-2-ones are obtained as representatives of these very rare heterocyclic systems. In the case of tetrahydrofuran derivatives
[EN] PIPERIDINES, PYRROLIDINES AND HEXAHYDRO-1H-AZEPINES PROMOTE RELEASE OF GROWTH HORMONE<br/>[FR] PIPERIDINES, PYRROLIDINES ET HEXAHYDRO-1H-AZEPINES FAVORISANT LA LIBERATION DE L'HORMONE DE CROISSANCE
申请人:MERCK & CO., INC.
公开号:WO1995013069A1
公开(公告)日:1995-05-18
(EN) The present invention is directed to certain piperidine, pyrrolidine, and hexahydro-1H-azepine compounds of general structural formula (I) wherein R1, R3, R4, R5, A, W, X, Y, and n are as defined herein. These compounds promote the release of growth hormone in humans and animals. This property can be utilized to promote the growth of food animals to render the production of edible meat products more efficient, and in humans, to treat physiological or medical conditions characterized by a deficiency in growth hormone secretion, such as short stature in growth hormone deficient children, and to treat medical conditions which are improved by the anabolic effects of growth hormone. Growth hormone releasing compositions containing such compounds as the active ingredient thereof are also disclosed.(FR) L'invention concerne certains composés de pipéridine, de pyrrolidine, et d'hexahydro-1H-azépine de formule structurale (I) dans laquelle R1, R3, R4, R5, A, W, X, Y et n sont définis dans la description. Ces composés favorisent la libération de l'hormone de croissance chez les humains et les animaux. Cette propriété peut être utilisée pour favoriser la croissance d'animaux destinés à l'alimentation et augmenter la production de produits de viande comestibles, et, chez les humains, pour traiter des états physiologiques ou médicaux caractérisés par une insuffisance de sécrétion de l'hormone de croissance telle que l'insuffisance staturale chez l'enfant, et traiter des états médicaux pouvant être améliorés par les effets anabolisants de l'hormone de croissance. L'invention porte également sur des compositions libérant l'hormone de croissance dans lesquelles lesdits composés sont utilisés comme principes actifs.