Mild conversion of propargylic alcohols to α,β-unsaturated enones in ionic liquids (ILs); a new ‘metal free’ life for the Rupe rearrangement
作者:Ganesh C. Nandi、Benjamin M. Rathman、Kenneth K. Laali
DOI:10.1016/j.tetlet.2013.09.028
日期:2013.11
free protocol for the conversion of propargylic alcohols to cyclic and acyclic α,β-unsaturated enones via the Rupe rearrangement is reported. The method utilizes the Brønsted acidic ionic liquid [BMIM-SO3H][OTf] as catalyst and [BMIM][PF6] as solvent and offers the potential for recycling and reuse of the IL solvent. The feasibility to synthesize bicyclic fused cyclopentenone derivatives via a Rupe → Aldol → Nazarov
[EN] ALKYNYL ALCOHOLS AS KINASE INHIBITORS<br/>[FR] ALCOOLS D'ALCYNYLE UTILISÉS COMME INHIBITEURS DE KINASES
申请人:AMGEN INC
公开号:WO2009158011A1
公开(公告)日:2009-12-30
Selected compounds are effective for prophylaxis and treatment of inflammation and inflammatory disorders, such as NIK-mediated disorders. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable salts thereof, pharmaceutical compositions and methods for prophylaxis and treatment of diseases and other maladies or conditions involving, inflammation and the like.
Construction of Vicinal Quaternary Centers via Iridium-Catalyzed Asymmetric Allenylic Alkylation of Racemic Tertiary Alcohols
作者:Mayuko Isomura、David A. Petrone、Erick M. Carreira
DOI:10.1021/jacs.1c00609
日期:2021.3.10
Enantioselective bond formation between stericallyhinderedfragments to furnish acyclic products with vicinal quaternary centers is a formidable challenge. We report a solution that involves cocatalysis between a chiral Ir–(phosphoramidite,olefin) complex and La(OTf)3. This robust catalytic system effects highly enantioconvergent and regioselective alkylation of racemic tertiary α-allenyl alcohols
在空间位阻片段之间形成对映选择性键以提供具有邻位四元中心的无环产物是一项艰巨的挑战。我们报告了一种解决方案,该解决方案涉及手性 Ir–(亚磷酰胺、烯烃)配合物和 La (OTf) 3之间的共催化. 这种强大的催化系统可实现外消旋叔 α-烯醇与四取代甲硅烷基乙烯酮缩醛的高度对映收敛和区域选择性烷基化。该转化对两种反应组分均显示出广泛的官能团耐受性,并允许以良好的收率和出色的对映选择性有效生成 β-烯丙酯产物。此外,通过一系列立体选择性金属催化的官能化反应,利用丙二烯和酯官能度来提升产品的结构复杂性。
The discovery of quinoline derivatives, as NF-κB inducing kinase (NIK) inhibitors with anti-inflammatory effects in vitro, low toxicities against T cell growth
are faced by the current inhibitor research to a certain extent. Besides, the compound's toxicity against the growth of T cells under non-stress conditions was evaluated, for the first time, as an indicator for the investigation to avoid potential safety risks. Pharmacokinetic properties evaluation of the lesstoxic compound 24c confirmed its good metabolic behavior (especially oral properties, F% = 21
Further Chemistry of Ruthenium Alkenyl Acetylide Complexes: Routes to Allenylidene Complexes via a Series of Electrophilic Addition Reactions
作者:Michael R. Hall、Marcus Korb、Stephen A. Moggach、Paul J. Low
DOI:10.1021/acs.organomet.0c00371
日期:2020.8.10
in the cationic allenylidene complexes trans-[RuC═C═C(Me)R}Cl(dppe)2]OTf ([1a–f]OTf) are readily deprotonated to give the corresponding alkenyl acetylide complexes trans-[RuC≡CC(═CH2)R}Cl(dppe)2] (3; R = Me (a), Ph (b), cC5H10 (c), 4-MeS-C6H4 (d), cC4H3S (e), cC5H4N (f)). Similar chemistry is also observed from [RuC═C═C(Me)Ph}(dppe)Cp*]PF6 ([2b]PF6) and [RuC═C═C(Me)(4-MeS-C6H4)}(dppe)Cp*]PF6([2b]PF6)
阳离子亚烯基配合物反式-[Ru C═C═C(Me)R} Cl(dppe)2 ] OTf([ 1a – f ] OTf)的甲基取代基很容易去质子化,得到相应的烯基乙炔基配合物反式-的[Ru C≡CC(= CH 2)R}氯(DPPE)2 ](3 ; R =我(一)中,Ph(b),C ^ C ^ 5 ħ 10(ç),4-MES-C 6 ħ 4(d),c C 4 H 3 S(e),cC 5 H 4 N(f))。从[Ru C═C═C(Me)Ph}(dppe)Cp *] PF 6([ 2b ] PF 6)和[Ru C═C═C(Me)(4-MeS) -C 6 ħ 4)} ...(DPPE)的Cp *] PF 6([图2b ] PF 6),选择以扩大反应范围,得到的[Ru C≡CC(= CH 2)PH}(DPPE)的Cp *] (4b)和[Ru C≡CC(= CH 2)(4-MeS-C 6 H