Stereoselective Alkene Isomerization over One Position
作者:Casey R. Larsen、Douglas B. Grotjahn
DOI:10.1021/ja3036477
日期:2012.6.27
Although controlling both the position of the double bond and E:Z selectivity in alkene isomerization is difficult, 1 is a very efficient catalyst for selective mono-isomerization of a variety of multifunctional alkenes to afford >99.5% E-products. Many reactions are complete within 10 min at room temperature. Even sensitive enols and enamides susceptible to further reaction can be generated. Catalyst
Exploration of phenylpropanoic acids as agonists of the free fatty acid receptor 4 (FFA4): Identification of an orally efficacious FFA4 agonist
作者:Steven M. Sparks、Christopher Aquino、Pierette Banker、Jon L. Collins、David Cowan、Caroline Diaz、Steven T. Dock、Donald L. Hertzog、Xi Liang、Erin D. Swiger、Josephine Yuen、Grace Chen、Channa Jayawickreme、David Moncol、Christopher Nystrom、Vincent Rash、Thomas Rimele、Shane Roller、Sean Ross
DOI:10.1016/j.bmcl.2017.01.034
日期:2017.3
The long chain free fatty acid receptor 4 (FFA4/GPR120) has recently been recognized as lipid sensor playing important roles in nutrient sensing and inflammation and thus holds potential as a therapeutic target for type 2 diabetes and metabolic syndrome. To explore the effects of stimulating this receptor in animal models of metabolic disease, we initiated work to identify agonists with appropriate
Enolization of Aldehydes and Ketones: Structural Effects on Concerted Acid−Base Catalysis
作者:Anthony F. Hegarty、Joseph P. Dowling、Stephen J. Eustace、Michelle McGarraghy
DOI:10.1021/ja9729544
日期:1998.3.1
the product of the consecutive rate constants (kA·kB) and the concerted (third order) rate constants (kAB). This implies that the concerted pathway is important only when both the generalacid and the generalbase terms are significant; this will be useful in designing other systems which might show such concertedcatalysis. In the case of aldehydes, a slope of 0.97 was found for this plot, which compares
A new synthetic approach for 2-alkylchromanones utilizing Fe (III)-catalyzed reductive cross-coupling of olefins with chromones has been developed. The reaction conditions are mild, and various substituted alkenes are applicable to the process. Moreover, control experiments were conducted, and a plausible mechanism is proposed.
已经开发了一种利用 Fe (III) 催化烯烃与色酮的还原交叉偶联的 2-烷基色酮的新合成方法。反应条件温和,可适用多种取代烯烃。此外,还进行了控制实验,并提出了一个合理的机制。
Measurement of rates and equilibria for keto-enol tautomerism of aldehydes using horseradish peroxidase compound I
the predominant excimer formed fluoresces a t shorter wavelength and decays preferentially to dimer 2. Since there is little spectroscopic evidence of strong association at any concentration of 1 in either homogeneous solution or reversed micelles, it is likely that the orientation is controlled by interaction of the stilbazolium cations with the negatively charged interface rather than to preferential