Phenylaminopropanol derivatives and methods of their use
申请人:Kim Younghee Callain
公开号:US20050222148A1
公开(公告)日:2005-10-06
The present invention is directed to phenylaminopropanol derivatives of formula I:
or a pharmaceutically acceptable salt thereof, compositions containing these derivatives, and methods of their use for the prevention and treatment of conditions ameliorated by monoamine reuptake including, inter alia, vasomotor symptoms (VMS), sexual dysfunction, gastrointestinal and genitourinary disorders, chronic fatigue syndrome, fibromylagia syndrome, nervous system disorders, and combinations thereof, particularly those conditions selected from the group consisting of major depressive disorder, vasomotor symptoms, stress and urge urinary incontinence, fibromyalgia, pain, diabetic neuropathy, and combinations thereof.
C−O Hydrogenolysis Catalyzed by Pd-PMHS Nanoparticles in the Company of Chloroarenes
作者:Ronald J. Rahaim、Robert E. Maleczka
DOI:10.1021/ol102757v
日期:2011.2.18
Catalytic Pd(OAc)2 and polymethylhydrosiloxane (PMHS), in conjunction with aqueous KF, and a catalytic amount of an aromaticchloride, effects the chemo-, regio-, and stereoselective deoxygenation of benzylic oxygenated substrates at room temperature in THF. Preliminary mechanistic experiments suggest the process to involve palladium−nanoparticle-catalyzed hydrosilylation followed by C−O reduction
Prompt Determination of Absolute Configuration for Epoxy Alcohols via Exciton Chirality Protocol
作者:Xiaoyong Li、Babak Borhan
DOI:10.1021/ja805058t
日期:2008.12.3
A microscale protocol for determination of absoluteconfigurations of 2,3-epoxy alcohols is described. 2,3-Disubstituted (cis and trans), 2,2-disubstituted, 2,2,3-trisubstituted, and 2,3,3-trisubstituted epoxy alcohols rendered prominent ECCD signals upon complexing with a Lewis acidic porphyrin tweezer and consequently provide straightforward assignment of chirality for epoxy alcohols. This method
The present invention relates to the synthesis of chiral epoxides via a catalytic asymmetric oxidation of olefins. Additionally, the methodology provides a method of asymmetrically oxidizing sulfides and phosphines. This asymmetric oxidation employs a catalyst system composed of a metal and a chiral bishydroxamic acid ligand, which, in the presence of a stoichiometric oxidation reagent, serves to asymmetrically oxidize a variety of substrates.
New opticallyactive hydroxamic acids bearing a 1,1′-binaphthyl group were prepared as ligands in a vanadium-catalyzed asymmetricepoxidation. The feature of these hydroxamic acids is a sterically hindered ligand. The asymmetricepoxidation with good selectivity and reactivity can be established by using VO(O-i-Pr)3 (5 mol%) and a small excess amount of ligand (7.5 mol%) with triphenylmethyl hydroperoxide
在钒催化的不对称环氧化反应中,制备了带有 1,1'-联萘基团的新型旋光异羟肟酸作为配体。这些异羟肟酸的特征是空间位阻配体。在-20 °C 的甲苯中,使用 VO(Oi-Pr)3 (5 mol%) 和少量过量的配体 (7.5 mol%) 与三苯甲基氢过氧化物 (TrOOH) 可以建立具有良好选择性和反应性的不对称环氧化反应. 二取代的烯丙醇比单取代或三取代的烯丙醇环氧化得更快,并且以良好到高的对映选择性 (48-94%ee) 获得。讨论了基于 1e 的 X 射线晶体结构的过渡态。