A thermal O-to-C [1,3]-rearrangement of α-hydroxy acid derived enol ethers was achieved under mild conditions. The 2-aminothiophenol protection of carboxylic acids facilitates formation of the [1,3] precursor and its thermalrearrangement via stabilization of a radical intermediate. Experimental and theoretical evidence for dissociative radical pair formation, its captodative stability via aminothiophenol
Rhodium-Catalyzed Acylation of Vinylsilanes with Acid Anhydrides
作者:Motoki Yamane、Kazuyoshi Uera、Koichi Narasaka
DOI:10.1246/bcsj.78.477
日期:2005.3
A catalytic acylation of vinylsilane with acid anhydride is accomplished by the use of [RhCl(CO)2]2, in which the transmetalation between vinylsilane and rhodium(I) carbonyl complex plays a key rol...
ANTIDIABETIC ENOLIC GLUCOSIDE OF PHENYLPYRUVIC ACID
申请人:Joubert Elizabeth
公开号:US20130310331A1
公开(公告)日:2013-11-21
There is provided an antidiabetic enolic glucoside of phenylpyruvic acid and derivatives thereof for use as medicaments, especially normoglycemic agents, i.e. for lowering blood glucose levels to normal levels in mammals that are obese, pre-diabetic or have diabetes, obesity and/or syndrome X. Hence the compounds of the present invention help to manage blood sugar levels, i.e. helping the body by balancing the blood sugar levels; helping to keep balanced blood glucose levels, particularly in humans with diabetes; aiding by enhancing the glucose uptake by the cells and by reducing sugar levels, thus improving or restoring the glucose tolerance; optimizing the glycemic response; normalizing the glucose tolerance.
Ozonolysis of Alkynes—A Flexible Route to Alpha-Diketones: Synthesis of AI-2
作者:Joshua L. Alterman、Dua X. Vang、Marissa Roghair Stroud、Larry J. Halverson、George A. Kraus
DOI:10.1021/acs.orglett.0c02182
日期:2020.10.2
A mild procedure for the low-temperature conversion of alkynes to diketones has been developed and employed in the synthesis of AI-2.
已经开发了一种温和的程序,用于将炔烃低温转化为二酮,并用于合成AI-2。
A Facile General Route to α-Keto Esters and α-Diketones
作者:Zong-xing Si、Xian-yun Jiao、Bing-fang Hu
DOI:10.1055/s-1990-26922
日期:——
A novel synthetic route to α-keto esters and α-diketones through ozonolytic fragmentation of α-substituted acetoacetic esters and α-substituted acetylacetones is described.