Facile synthesis of 1,2,3-tricarbonyls from 1,3-dicarbonyls mediated by cerium(IV) ammonium nitrate
作者:Akhil Sivan、Ani Deepthi
DOI:10.1016/j.tetlet.2014.01.145
日期:2014.3
A mild and efficient protocol for the synthesis of vicinal tricarbonyl compounds from β-dicarbonyls in a single step using cerium(IV) ammoniumnitrate as a catalytic oxidant is described. Ease of execution, wide substrate scope and the suitability for the synthesis of commercially important compounds like ninhydrin, alloxan and oxoline make this reaction particularly noteworthy.
Direct Synthesis of <i>N</i>
-Acyl-<i>N</i>
,<i>O</i>
-hemiacetals <i>via</i>
Nucleophilic Addition of Unactivated Amides and Their <i>O</i>
-Acetylation: Access to α,α-Difunctionalized <i>N</i>
-Acylimines
metal‐free synthesis of polyfunctionalized N‐acyl‐N,O‐hemiacetals was developed via the nucleophilic addition of unactivated amides to ketones. The protocol demonstrated a wide substrate scope, with good isolated yields. Additionally, their O‐acetylated products serve as a precursor of α,α‐difunctionalized N‐acylimines. An addition reaction of broad scope of nucleophiles to generate N‐acylimines is
A metal‐free, one‐potsynthesis of 1,2‐naphthoquinone was accomplished from 2‐naphthol by utilizing economically cheap NBS under open air conditions. Initial formation of 1,1‐dibromonaphthalen‐2‐one and subsequent transformation afforded the 1,2‐naphthoquinone. This oxidation was completed within 30 min and had broad substrate scope. Moreover, this system tolerated heterocyclic systems and was also
Iron-Mediated Cleavage of CC Bonds in Vicinal Tricarbonyl Compounds in Water
作者:Jasmin Mecinović、Refaat B. Hamed、Christopher J. Schofield
DOI:10.1002/anie.200806296
日期:2009.3.30
Three of a kind: Vicinaltricarbonylcompounds undergo CCcleavage mediated by ferric ions (see scheme). The observed cleavage of ninhydrin and dehydroascorbic acid has relevance for amino acid detection and the metabolism of vitamin C.
[EN] PYRAZOLOISOQUINOLINE DERIVATIVES AS KINASE INHIBITORS<br/>[FR] DERIVES DE PYRAZOLOISOQUINOLINE UTILES COMME INHIBITEURS DE KINASE
申请人:AVENTIS PHARMA INC
公开号:WO2005012301A1
公开(公告)日:2005-02-10
Novel pyrazoloisoquinoline derivatives as kinase inhibitors are disclosed which are suitable for producing pharmaceuticals for the prophylaxis and therapy of diseases whose course involves an increased activity of NIK.