[EN] A NEW METHOD OF 18F LABELLING AND INTERMEDIATE SALTS<br/>[FR] NOUVEAU PROCÉDÉ D'ÉTIQUETAGE DE 18F ET DE SELS INTERMÉDIAIRES
申请人:NAT UNIV SINGAPORE
公开号:WO2021126080A1
公开(公告)日:2021-06-24
Disclosed herein is a salt of formula I: where R1, X, n, R, R1, Y, m, p, q, Z and o are as defined herein. Also disclosed herein are methods of using said salts in chemical synthesis, such as to prepare compounds isotopically enriched in 18F for use in PET imaging, as well as methods to make the compounds of formula I.
Frustrated Lewis-Pair-Meditated Selective Single Fluoride Substitution in Trifluoromethyl Groups
作者:Dipendu Mandal、Richa Gupta、Amit K. Jaiswal、Rowan D. Young
DOI:10.1021/jacs.9b12167
日期:2020.2.5
developed a generic protocol that allows a single substitution of one fluoride in trifluoromethylgroups with neutral phosphine and pyridine bases. The resulting phosphonium and pyridinium salts can be further functionalized via nucleophilic substitution, photoredox coupling and electrophilic transfer reactions allowing the generation of a vast array of difluoromethyl products.
Transition-Metal-Free Cross-Coupling of Aryl Halides with Arylstannanes
作者:Qing He、Liwen Wang、Yong Liang、Zunting Zhang、Stanislaw F. Wnuk
DOI:10.1021/acs.joc.6b01648
日期:2016.10.7
Transition-metal-free LiCl-promoted cross-coupling reactions of tetraphenyltin, trichlorophenyl-, dichlorodiphenyl-, and chlorotriphenylstannanes with arylhalides in DMF provided access to biaryls in good to high yields. Up to four phenyl groups were transferred from the organostannanes substrates. The aryls bearing electron-withdrawing groups in either halides or organotin substrates gave coupling
Suzuki-Miyaura cross-coupling catalyzed by protein-stabilized palladium nanoparticles under aerobic conditions in water: application to a one-pot chemoenzymatic enantioselective synthesis of chiral biaryl alcohols
protein (DNA binding protein from starved cells) and the use of this precatalyst system in Suzuki-Miyauracross-couplingreactions under aerobic conditions in water is described, as well as a two-step one-potSuzuki-Miyauracross-coupling followed by an enantioselective enzyme-catalyzed reduction to form chiral biaryl alcohols.
Catalytic Decarboxylative Cross‐Coupling of Aryl Chlorides and Benzoates without Activating
<i>ortho</i>
Substituents
作者:Jie Tang、Agostino Biafora、Lukas J. Goossen
DOI:10.1002/anie.201505843
日期:2015.10.26
substrates was overcome by holistic optimization of a bimetallic Cu/Pd catalyst system. The combination of a CuI/Me4phen decarboxylation catalyst and a [(MeCN)4Pd](OTf)2/XPhos cross‐coupling catalyst enables the synthesis of biaryls from inexpensive aryl chlorides and potassium benzoates regardless of their substitution pattern.
通过整体优化双金属Cu / Pd催化剂体系,克服了脱羧交叉偶联反应对邻位取代或杂环羧酸酯底物的限制。CuI / Me 4 phen脱羧催化剂和[(MeCN)4 Pd](OTf)2 / XPhos交叉偶联催化剂的组合,无论其取代方式如何,均能从廉价的芳基氯化物和苯甲酸钾合成联芳基。