the synthesis of fluorinatedcompounds have been intensively studied, recently. Development of practical fluorinating reagents is indispensable for this purpose. Herein, bench-stable electrophilic fluorinating reagents were synthesized as N-fluorobenzenesulfonimide (NFSI) substitutes. Reagents obtained by replacing one of the NFSI sulfonyl groups with an acyl group led to the highly selective monofluorination
Direct α-Fluorination of Ketones Using N-F Reagents
作者:Stojan Stavber、Marjan Jereb、Marko Zupan
DOI:10.1055/s-2002-35625
日期:——
bis(tetrafluoroborate) (Accufluor NFTh) as a fluorine atom transfer reagent and methanol as solvent enabled direct regiospecific fluorofunctionalization of the u-carbonyl position in ketones without prior activation of the target molecules. Methoxy or hydroxy substituted derivatives of 1-indanone, 1-tetralone and oxo derivatives of thiophene, benzo[b]thiophene, benzofuran and benzopyran were regiospecifically
A diastereoselective Mannich reaction of α-fluoroketones with ketimines: Construction of β-fluoroamine motifs with vicinal tetrasubstituted stereocenters
作者:Jian-bo Zhao、Xinfeng Ren、Bu-quan Zheng、Jian Ji、Zi-bin Qiu、Ya Li
DOI:10.1016/j.tetlet.2018.04.051
日期:2018.5
reaction has been developed for the synthesis of chiral β-fluoroamine motifs by the reaction of α-fluoroketones with ketimines, including isatin-derived ketimines and phenylglyoxylate-derived ketimines. This method provides a concise route to a variety of biologically important 3-aminooxindoles and α-amino acids featuring fluorine-containing vicinaltetrasubstituted stereocenters.
Catalytic Asymmetric Mannich Reactions with Fluorinated Aromatic Ketones: Efficient Access to Chiral β-Fluoroamines
作者:Barry M. Trost、Tanguy Saget、Andreas Lerchen、Chao-I Joey Hung
DOI:10.1002/anie.201509719
日期:2016.1.11
herein is a Zn/Prophenol‐catalyzed Mannich reactionusing fluorinated aromatic ketones as nucleophilic partners for the direct enantio‐ and diastereoselective construction of β‐fluoroamine motifs featuring a fluorinated tetrasubstituted carbon. The reaction can be run on a gram scale with a lowcatalystloading without impacting its efficiency. Moreover, a related aldolreaction was also developed. Together
Fluorinated Aromatic Ketones as Nucleophiles in the Asymmetric Organocatalytic Formation of CC and CN Bonds: A Facile Route to the Construction of Fluorinated Quaternary Stereogenic Centers
作者:Yujun Zhao、Yuanhang Pan、Hongjun Liu、Yuanyong Yang、Zhiyong Jiang、Choon‐Hong Tan
DOI:10.1002/chem.201003761
日期:2011.3.21
Highly enantioselective Mannich and α‐amination reactions have been successfully developed using α‐fluorinated aromaticketones as fluorocarbon nucleophiles in the presence of a bicyclic chiral guanidine (see scheme; Ms=methanesulfonyl). This method is a simple and efficient approach to the construction of fluorinated quaternary stereogenic centers.
在双环手性胍存在下,使用α-氟化的芳族酮作为碳氟亲核试剂,已经成功开发出高度对映选择性的曼尼希和α-氨基化反应(参见方案; Ms =甲磺酰基)。该方法是构建氟化四元立体异构中心的一种简单有效的方法。