[EN] TETRAHYDROPYRANYL CYCLOPENTYL TETRAHYDROISOQUINOLINE MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY [FR] MODULATEURS DE L'ACTIVITE DES RECEPTEURS DES CHIMIOKINES A BASE DE TETRAHYDROPYRANYL CYCLOPENTYL TETRAHYDROISOQUINOLINE
Scalable and safe synthetic organic electroreduction inspired by Li-ion battery chemistry
作者:Byron K. Peters、Kevin X. Rodriguez、Solomon H. Reisberg、Sebastian B. Beil、David P. Hickey、Yu Kawamata、Michael Collins、Jeremy Starr、Longrui Chen、Sagar Udyavara、Kevin Klunder、Timothy J. Gorey、Scott L. Anderson、Matthew Neurock、Shelley D. Minteer、Phil S. Baran
DOI:10.1126/science.aav5606
日期:2019.2.22
Scaled-up sodium-free Birchreductions The so-called Birchreduction is frequently used by chemists despite its daunting conditions: Pyrophoric sodium is dissolved in pure liquified ammonia to achieve partial reduction of aromatics. Peters et al. surveyed and then optimized small-scale electrochemical alternatives to devise a safer protocol that can work on a larger scale with a broad range of functionally
Mononuclear Nonheme Iron(III)‐Iodosylarene and High‐Valent Iron‐Oxo Complexes in Olefin Epoxidation Reactions
作者:Bin Wang、Yong‐Min Lee、Mi Sook Seo、Wonwoo Nam
DOI:10.1002/anie.201505796
日期:2015.9.28
High‐spin iron(III)‐iodosylarene complexes are highly reactive in the epoxidation of olefins, in which epoxides are formed as the major products with high stereospecificity and enantioselectivity. The reactivity of the iron(III)‐iodosylarene intermediates is much greater than that of the corresponding iron(IV)‐oxo complex in these reactions. The iron(III)‐iodosylarene species—not high‐valent iron(IV)‐oxo
Polymer immobilized tantalum(<scp>v</scp>)–amino acid complexes as selective and recyclable heterogeneous catalysts for oxidation of olefins and sulfides with aqueous H<sub>2</sub>O<sub>2</sub>
作者:Gangutri Saikia、Kabirun Ahmed、Chandrasee Rajkhowa、Mitu Sharma、Hiya Talukdar、Nashreen S. Islam
DOI:10.1039/c9nj04180j
日期:——
organic sulfides to the desired sulfoxides with H2O2 in methanol, undermild reaction conditions. The oxidations proceeded with a high H2O2 efficiency percentage and are amenable to ready scalability. The heterogeneous catalysts could be easily recovered and reused for several consecutive catalytic cycles with undiminished activity/selectivity profiles in all cases. The developed catalytic strategies
通过将Ta(V)-diperoxo物种锚定到用氨基酸天冬酰胺(L -Asn)和精氨酸(L -Arg)功能化的氯甲基化聚(苯乙烯-二乙烯基苯)树脂上,制备了聚合物负载的多相过氧钽(V)催化剂。结构上良好定义的催化剂,[钽(O 2)2(L)2 ] - - MR,[L =天冬酰胺(催化剂1)或精氨酸(催化剂2)和MR =梅里菲尔德树脂],进行综合通过元素分析(CHN,ICP-OES,能量色散X射线光谱),光谱研究(FT-IR,拉曼,13 C NMR,漫反射UV-vis和XPS),SEM,XRD,Brunauer-Emmett-Teller(BET)和热重分析(TGA)。负载的过氧钽(pTa)化合物在无溶剂的反应条件下,在烯烃与30%H 2 O 2的环氧化反应中表现出出色的催化性能。苯乙烯以> 99%的选择性被环氧化,在30分钟的反应时间内获得的最高TOF为1040 h -1,而降冰片烯环氧化的TOF在1
Highly selective aqueous heterogeneous oxygenation of hydrocarbons catalyzed by recyclable hydrophobic copper (II) phthalocyanine nanoparticles
aqueous catalytic method for selective epoxidation of olefins and oxidation of saturated hydrocarbons to ketones using aqueous solution of tetra-n-butylammonium peroxomonosulfate (TBAOX) containing water-insoluble copper (II) phthalocyanine nanoparticles has been developed. No surfactants, additives, toxic reagents or solvents were involved. The impressive turnover numbers obtained for CuPc in this oxidation
Catalytic epoxidation of alkenes by co-ordinatively unsaturated phosphino complexes of ruthenium(II) and osmium(II)
作者:Mario Bressan、Antonino Morvillo
DOI:10.1039/c39880000650
日期:——
Ruthenium(II) and osmium(II) complexes [MCl(LL)2]Y, where LL is 1,3-bis(diphenylphosphino)propane or 1-diphenylphosphino-2-(2′-pyridyl)ethane, promote the oxidation of a number of alkenes by PhIO, hypochlorites, and H2O2.
钌(II)和(II)配合物[MCl(LL)2 ] Y,其中LL为1,3-双(二苯基膦基)丙烷或1-二苯基膦基-2-(2'-吡啶基)乙烷,可促进氧化PhIO,次氯酸盐和H 2 O 2形成许多烯烃。