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.
(43), prepared from N-(4-bromophenyl)benzamide (47) via49 and 50 to give 1-4-1-[2-amino-7-methyl-4-(1-methylethoxy)pteridin-6-yl]ethyl}amino}phenyl}-1-deoxy-D-ribitol (44) in 62% yield (Scheme 3). Acid cleavage of the isopropylidene groups at room temperature led to 45 and on boiling to 1-4-[1-(2-amino-3,4-dihydro-7-methyl-4-oxopteridin-6-yl)ethyl]amino}phenyl}-1-deoxy-D-ribitol (46). The next step
Zur Herstellung von 1,2,3-Tricarbonylverbindungen aus 1,3-Dicarbonylverbindungen. 27. Mitteilung über Reduktone und Tricarbonylverbindungen [1]
作者:Francis Dayer、Huu Lê Dao、Hellmut Gold、Heike Rodé-Gowal、Hans Dahn
DOI:10.1002/hlca.19740570736
日期:1974.11.6
The synthesis of 22 substituted tricarbonyl compounds is reported. They were obtained either by oxidation of β-dicarbonyl compounds with SeO2 or nitrous oxides or by oxidation of the α-bromo-β-dicarbonyl compounds with DMSO. The procedures using SeO2 or DMSO are more rapid and give in general better yields than other methods described in the literature.
Ozonolysis of Enol Ethers. Part 10. Ozonization of Enol Ethers from 1,2- and 1,3-Dicarbonyl Compounds: Direct Quantitative Synthesis of Phthalonic Acid Anhydride The results of ozonolyses of enol ethers from 1,2- and 1,3-dicarbonyl compounds presented here strongly indicate that these reactions do not proceed via the established Criegee ozonolysis mechanism for nucleophilic CC bonds. The quantitative
Esters of 2-(1-hydroxyalkyl)-1,4-dihydroxy-9,10-anthraquinones with melphalan as multifunctional anticancer agents
作者:Guang-Zhu Jin、Young-Jae You、Byung-Zun Ahn
DOI:10.1016/s0960-894x(01)00260-8
日期:2001.6
Eight esters of 2-(1-hydroxyalkyl)-1,4-dihydroxy-9,10-anthraquinone with melphalan were prepared and tested for their antitumor activity (S-180) and cytotoxicity. 2-[1-[4-(p-Bis(2-chloroethyl)-aminophenyl)-butanoyloxy]methyl]-1,4-dihydroxy-9,10-anthraquinone and 2-[1-[4-(p-bis(2-chloroethyl)-aminophenyl)-butanoyloxy]ethyl]-1,4-dihydroxy-9,10-anthraquinone showed remarkable antitumor activity (T/C,