Fluorodecarboxylation: Synthesis of aryl trifluoromethyl ethers (ArOCF3) and thioethers (ArSCF3)
作者:Sankarganesh Krishanmoorthy、Simon D. Schnell、Huong Dang、Fang Fu、G.K. Surya Prakash
DOI:10.1016/j.jfluchem.2017.07.017
日期:2017.11
Fluorodecarboxylation of aryloxydifluoroacetic acid (ArOCF2CO2H) and arylmercaptodifluoroacetic acid (ArSCF2CO2H) towards ArXCF3 (X = O, S) using silver (I) salts in the presence of Selectfluor in a biphasic system with trifluoroacetic acid additive is discussed.
在具有三氟乙酸添加剂的双相体系中,在Selectfluor的存在下,使用银(I)盐存在下,使用银(I)盐将芳氧基二氟乙酸(ArOCF 2 CO 2 H)和芳基巯基二氟乙酸(ArSCF 2 CO 2 H)朝ArXCF 3(X = O,S)进行氟羧化讨论。
A Convenient Synthesis of Difluoroalkyl Ethers from Thionoesters Using Silver(I) Fluoride
作者:Josiah Newton、Daniel Driedger、Matthew B. Nodwell、Paul Schaffer、Rainer E. Martin、Robert Britton、Chadron M. Friesen
DOI:10.1002/chem.201904132
日期:2019.12.13
thionoesters using only silver(I) fluoride. This reaction demonstrates excellent functional group tolerance and complements existing strategies for difluoroalkyl ethersynthesis, which rely on toxic and often dangerous reagents that demonstrate limited functional group compatibility. We additionally report the translation of this finding to the production of 18 F-labelled difluoroalkyl ethersusing fluoride-derived
在此,我们报告了仅使用氟化银 (I) 对硫酯进行温和快速的氟化脱硫。该反应表现出出色的官能团耐受性,并补充了现有的二氟烷基醚合成策略,这些策略依赖于有毒且通常是危险的试剂,这些试剂表现出有限的官能团相容性。我们还报告了将这一发现转化为使用氟化物衍生的 [18 F]AgF 生产 18 F 标记的二氟烷基醚。这种新工艺应该能够合成范围广泛的二氟烷基醚,并在医药和材料化学以及放射性示踪剂生产中得到应用。
Reactions of (chlorodifluoromethyl)benzene and (chlorodifluoromethoxy)benzene with nucleophilic reagents
Condensation reactions of (chlorodifluoromethyl)benzene and (chlorodifluoromethoxy)benzene with phenoxide and thiophenoxide ions have been performed in DMF or NMP with heating. In these conditions, the reaction between phenylselenide ion and (chlorodifluoromethyl)benzene did not occur. This latter reaction requires an additional visible light irradiation to proceed, as reported by Yoshida et al.