碘氟代烷烃C n F 2 n +1 I(n = 2、3、4)和n -BuLi在低温下的反应为LiC n F 2 n +1的NMR光谱学证据提供了证据,该LiC n F 2 n +1转化为LiCu(C n F 2)ñ 1)2在与0.5摩尔铜(治疗衍生物我),溴化的CuBr。获得全氟有机铜对Cu(R f)2 Ag(R f = n -C 3 F 7,n-C 4 F 9,C 6 F 5)是通过相应的全氟有机银(I)试剂AgR f和元素铜通过氧化还原金属转移反应而获得的。通过19 F NMR光谱法和ESI质谱法研究所得的反应性中间体的组成。全氟正丙基和全氟正通过氧化性金属转移途径制备的丁基铜-银试剂即使在中等条件下,在与酰氯的C-C键形成反应中也表现出良好的性能。在高温下,与氟原子直接键合到芳族化合物上的溴取代反应得以实现,而使用锂铜对进行卤化物取代反应的成功率仍然很低。
This invention relates to methods and small molecules having a phosphate group that can be used to inhibit phosphate transport and to treat or prevent diseases that are related to disorders in the maintenance of normal serum phosphate levels.
NHC-Catalyzed ε-Umpolung via <i>p</i>-Quinodimethanes and Its Nucleophilic Addition to Ketones
作者:Lei Dai、Song Ye
DOI:10.1021/acscatal.9b04409
日期:2020.1.17
An unprecedented NHC-catalyzed generation of p-quinodimethanes via ε-umpolung of 4-(chloromethyl)benzaldehydes and the following ε-addition to active ketones was developed. A series of active ketones, such as trifluoromethyl ketones and 1,2-dicarbonyl compounds, worked well for the reaction, giving the corresponding trifluoromethyl alcohols and α-hydroxyl carbonyl compounds in good yields.
Practical, Broadly Applicable, α-Selective, <i>Z</i>-Selective, Diastereoselective, and Enantioselective Addition of Allylboron Compounds to Mono-, Di-, Tri-, and Polyfluoroalkyl Ketones
作者:Farid W. van der Mei、Changming Qin、Ryan J. Morrison、Amir H. Hoveyda
DOI:10.1021/jacs.7b05011
日期:2017.7.5
accessible unsaturated organoboron compounds serve as reagents. Transformations were performed with 0.5-2.5 mol % of a boron-based catalyst, generated in situ from a readily accessible valine-derived aminophenol and a Z- or an E-γ-substituted boronic acid pinacol ester. With a Z organoboron reagent, additions to trifluoromethyl and polyfluoroalkyl ketones proceeded in 80-98% yield, 97:3 to >98:2 α:γ selectivity
Chemo- and Enantioselective Addition and β-Hydrogen Transfer Reduction of Carbonyl Compounds with Diethylzinc Reagent in One Pot Catalyzed by a Single Chiral Organometallic Catalyst
作者:Huayin Huang、Hua Zong、Guangling Bian、Ling Song
DOI:10.1021/acs.joc.5b01871
日期:2015.12.18
as the catalyst, the asymmetric β-H transfer reduction of aromatic α-trifluoromethyl ketones and enantioselective addition of aromatic aldehydes with Et2Zn in one pot were successfully realized, affording the corresponding additive products of secondary alcohols in high yields (up to 99%) with excellent enantioselectivities (up to 98% ee) and the reduction products of α-trifluoromethyl alcohols in good
Sc(OTf)<sub>3</sub>-Catalyzed C2-Selective Cyanation/Defluorination Cascade of Perfluoroalkylated 3-Indolylmethanols and Application to the Synthesis of 3-Fluoro(perfluoroalkyl)-β-carbolines
perfluoroalkylated 3-indolylmethanols with TMSCN is described, which provides a novel and practical strategy for the synthesis of structurally diverse 3-(2-cyano)-indolyl substituted gem-difluoroalkenes and β-fluoro-β-perfluoroalkylalkenes. The reaction features excellent regio- and stereoselectivity and broad substrate scope. Notably, the obtained gem-difluoroalkenes and β-fluoro-β-perfluoroalkylalkenes