A Fluorinated Ligand Enables Room-Temperature and Regioselective Pd-Catalyzed Fluorination of Aryl Triflates and Bromides
摘要:
A new biaryl monophosphine ligand (AlPhos, L1) allows for the room-temperature Pd-catalyzed fluorination of a variety of activated (hetero)aryl trifiates. Furthermore, aryl triflates and bromides that are prone to give mixtures of regioisomeric aryl fluorides with Pd-catalysis can now be converted to the desired aryl fluorides with high regioselectivity. Analysis of the solid-state structures of several Pd(II) complexes, as well as density functional theory (DFT) calculations, shed light on the origin of the enhanced reactivity observed with L1.
Nucleophilic fluorination facilitated by a CsF–CaF<sub>2</sub> packed bed reactor in continuous flow
作者:M. B. Johansen、A. T. Lindhardt
DOI:10.1039/c7cc09035h
日期:——
A simple to prepare, dry and handle packed bed reactor carrying CsF on CaF2, towards nucleophilic fluorinations in continuous flow, is reported. The reactor also proved adaptable for silyl-ether deprotection and trifluoromethylations with Ruppert's reagent. The study includes reactor stability and scale-up investigations.
Tetramethylammonium Fluoride Alcohol Adducts for S<sub>N</sub>Ar Fluorination
作者:María T. Morales-Colón、Yi Yang See、So Jeong Lee、Peter J. H. Scott、Douglas C. Bland、Melanie S. Sanford
DOI:10.1021/acs.orglett.1c01490
日期:2021.6.4
aprotic conditions to maintain the nucleophilicity of fluoride and suppress the generation of side products. This report addresses this challenge by leveraging tetramethylammonium fluoride alcohol adducts (Me4NF·ROH) as fluoride sources for SNAr fluorination. Through systematic tuning of the alcohol substituent (R), tetramethylammonium fluoride tert-amyl alcohol (Me4NF·t-AmylOH) was identified as an
亲核芳族氟化 (S N Ar) 是形成 C(sp 2 )-F 键的最常用方法之一。尽管最近取得了许多进展,但这些转化的长期限制是需要严格干燥的非质子条件来保持氟化物的亲核性并抑制副产物的产生。本报告通过利用四甲基氟化铵醇加合物 (Me 4 NF·ROH) 作为 S N Ar 氟化的氟化物来源解决了这一挑战。通过系统调整醇取代基 (R),四甲基氟化铵叔戊醇 (Me 4 NF· t-AmylOH) 被确定为在温和方便的条件下(DMSO 中 80°C,无需干燥试剂或溶剂)下用于 S N Ar 氟化的廉价、实用且台式稳定的试剂。展示了超过 50 种(杂)芳基卤化物和硝基芳烃亲电子试剂的底物范围。
Synthesis and anodic electrochemistry of cymanquine and related complexes
作者:Kevin Lam、William E. Geiger
DOI:10.1016/j.jorganchem.2016.05.009
日期:2016.8
manganese tricarbonyl moiety. One of these (“cymanquine”, 4) is the analogue of the potent antimalarial drug ferroquine in which an FeCp group has been replaced by a Mn(CO)3 group. The anodic electrochemistry of the new compounds was investigated in dichloromethane, using [NBu4][B(C6F5)4] as the supporting electrolyte. Compared to ferroquine, oxidations of the new compounds occur at considerably more
已经制备了三种化合物,其中4-氨基氯喹啉部分与环戊二烯基锰三羰基部分共价连接。其中之一(“ cymanquine”,4)是有效的抗疟疾药物铁喹类似物,其中FeCp基团已被Mn(CO)3基团取代。以[NBu 4 ] [B(C 6 F 5)4 ]为辅助电解质,在二氯甲烷中研究了新化合物的阳极电化学。与四氢呋喃相比,新化合物的氧化反应发生在正电位更高,并且高度不可逆,位于其胺基而不是在有机金属中心。
[EN] CYMANQUINE COMPOUNDS AND DERIVATIVES THEREOF AND USES THEREOF<br/>[FR] COMPOSÉS DE CYMANQUINE ET LEURS DÉRIVÉS, ET UTILISATIONS ASSOCIÉES
申请人:UNIV VERMONT
公开号:WO2016109849A1
公开(公告)日:2016-07-07
Organometallic compounds comprising a chloroquinoline moiety and uses the compounds. The compounds are, for example, manganese or rhenium complexes of a ligand comprising a chloroquinoline moiety. The compounds can be used in, for example, methods of inhibiting cell growth.
[EN] USE OF CYMANQUINE COMPOUNDS AS ANTIMALARIAL AGENTS<br/>[FR] UTILISATION DE COMPOSÉS DE CYMANQUINE EN TANT QU'AGENTS ANTIPALUDIQUES
申请人:UNIV OF VERMONT AND STATE AGRICULTURAL COLLEGE
公开号:WO2017015344A1
公开(公告)日:2017-01-26
Organometallic compounds comprising a chloroquinoline moiety for use in the prophylaxis and treatment of malaria. The compounds can be manganese or rhenium complexes of a ligand comprising a chloroquinoline moiety.