Synthesis of Polyfluoro Ketones for Selective Inhibition of Human Phospholipase A2 Enzymes
摘要:
The development of selective inhibitors for individual PLA(2) enzymes is necessary in order to target PLA(2)-specific signaling pathways, but it is challenging due to the observed promiscuity of known PLA(2) inhibitors. In the current work, we present the development and application of a variety of synthetic routes to produce pentafluoro, tetrafluoro, and trifluoro derivatives of activated carbonyl groups in order to screen for selective inhibitors and characterize the chemical properties that can lead to selective inhibition. Our results demonstrate that the pentafluoroethyl ketone functionality favors selective inhibition of the GVIA iPLA(2), a very important enzyme for which specific, potent, reversible inhibitors are needed. We find that 1,1,1,2,2-pentafluoro-7-phenyl-heptan-3-one (FKGK11) is a selective inhibitor of GVIA iPLA(2) (X-1(50) = 0.0073). Furthermore, we conclude that the introduction of an additional fluorine atom at the alpha' position of a trifluoromethyl ketone constitutes an important strategy for the development of new potent GVIA iPLA(2) inhibitors.
Synthesis of Polyfluoro Ketones for Selective Inhibition of Human Phospholipase A2 Enzymes
摘要:
The development of selective inhibitors for individual PLA(2) enzymes is necessary in order to target PLA(2)-specific signaling pathways, but it is challenging due to the observed promiscuity of known PLA(2) inhibitors. In the current work, we present the development and application of a variety of synthetic routes to produce pentafluoro, tetrafluoro, and trifluoro derivatives of activated carbonyl groups in order to screen for selective inhibitors and characterize the chemical properties that can lead to selective inhibition. Our results demonstrate that the pentafluoroethyl ketone functionality favors selective inhibition of the GVIA iPLA(2), a very important enzyme for which specific, potent, reversible inhibitors are needed. We find that 1,1,1,2,2-pentafluoro-7-phenyl-heptan-3-one (FKGK11) is a selective inhibitor of GVIA iPLA(2) (X-1(50) = 0.0073). Furthermore, we conclude that the introduction of an additional fluorine atom at the alpha' position of a trifluoromethyl ketone constitutes an important strategy for the development of new potent GVIA iPLA(2) inhibitors.
Photoredox Catalysis Mediated Application of Methyl Fluorosulfonyldifluoroacetate as the CF<sub>2</sub>CO<sub>2</sub>R Radical Source
作者:Wei Yu、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.orglett.6b02580
日期:2016.10.7
A new application of trifluoromethylating reagent, methyl fluorosulfonyldifluoroacetate (FO2SCF2CO2Me, Chen’s reagent), as the carbomethoxydifluoromethylating reagent under visible light photoredox conditions is reported. The visible-light-induced reaction of FO2SCF2CO2Me with unactivated alkenes, styrenes, or heteroarenes affords a variety of carbomethoxydifluoromethylated products.
报道了三氟甲基化试剂,氟磺酰基二氟乙酸甲酯(FO 2 SCF 2 CO 2 Me,Chen氏试剂)在可见光光氧化还原条件下作为羧甲氧基二氟甲基化试剂的新应用。FO 2 SCF 2 CO 2 Me与未活化的烯烃,苯乙烯或杂芳烃的可见光诱导反应产生了多种甲氧基二氟甲基化产物。