Variations on the Blaise Reaction: Synthesis of 3,5-Dioxopentanoates and 3-Amino-5-oxopent-3-enoates
作者:H. Rao、Nandurka Muthanna
DOI:10.1055/s-0035-1561662
日期:——
(α-cyano ketones) with ethyl bromoacetate. The reaction is a variation on the classical Blaise reaction, tuned to the synthesis of trifunctional compounds having 3,5-diketo ester or 3-enamino 5-keto ester functional groups. Our studies revealed that the Blaise reaction on the nitrile occurs in preference to the Reformatsky reaction on the neighboring ketone when the two functional groups are in a geminal
Novel ramoplanin derivatives are disclosed. These ramoplanin derivatives exhibit antibacterial activity. As the compounds of the subject invention exhibit potent activities against gram positive bacteria, they are useful antimicrobial agents. Methods of synthesis and of use of the compounds are also disclosed.
The present invention are 2-(2-aryl-2-oxo-alkylidene) analogs of 1,2,3,4-tetrahydropyridine-3,5-pyridinecarboxylic acids and particularly esters thereof having valuable calcium antagonist and positive inotropic activity useful in the treatment of cardiovascular disorders, pharmaceutical compositions and methods of use therefor.
Antitumor agents 270. Novel substituted 6-phenyl-4H-furo[3,2-c]pyran-4-one derivatives as potent and highly selective anti-breast cancer agents
作者:Yizhou Dong、Qian Shi、Kyoko Nakagawa-Goto、Pei-Chi Wu、Susan L. Morris-Natschke、Arnold Brossi、Kenneth F. Bastow、Jing-Yu Lang、Mien-Chie Hung、Kuo-Hsiung Lee
DOI:10.1016/j.bmc.2009.11.049
日期:2010.1
synthesized and evaluated as novel anti-breast canceragents. Compounds 10–13, 23, 25, and 27 showed potent inhibition against the SK-BR-3 breast cancer cell line. Importantly, 25 and 27 showed the highest cancer cell line selectivity, being approximately 100–250-fold more potent against SK-BR-3 (ED50 0.28 and 0.44 μM, respectively) compared with other cancer cell lines tested. In addition, 25 displayed
Synthesis of 1,3,5-Tricarbonyl Derivatives by Condensation of 1,3-Bis(silyl enol ethers) with Acid Chlorides
作者:Thomas Rahn、Van T. H. Nguyen、T. H. Tam Dang、Zafar Ahmed、Karen Methling、Michael Lalk、Christine Fischer、Anke Spannenberg、Peter Langer
DOI:10.1021/jo062153w
日期:2007.3.1
A variety of 1,3,5-tricarbonyl derivatives were prepared by reaction of 1,3-bis(silyl enol ethers) with acidchlorides under mild conditions. This includes reactions of both aromatic and aliphatic acidchlorides and bis(acidchlorides). The yields vary depending on the type of acidchloride employed.