N-Fluoropyridinium salts provide a new system of fluorinatingagents by which a wide range of nucleophilic substrates differing in reactivity can be fluorinated due to the varying degree of fluorinating power and also fluorinated very selectively through structural alteration. The scope of selective fluorination should be broadened considerably on the basis of the present results. The N-fluoropyridinium
N-fluoropyridinium triflate and its derivatives: Useful fluorinating agents
作者:Teruo Umemoto、Kosuke Kawada、Kyoichi Tomita
DOI:10.1016/s0040-4039(00)84980-1
日期:1986.1
N-Fluoropyridinium triflate and its derivatives, stable and nonhygroscopic crystals, were found to be widely applicable reagents for mild and selective fluorination of a variety of organic compounds.
[EN] SUBSTITUTED ADENINES AND THE USE THEREOF<br/>[FR] ADENINES SUBSTITUEES ET LEUR UTILISATION
申请人:ASTRAZENECA AB
公开号:WO2006040558A1
公开(公告)日:2006-04-20
This invention relates to compounds of Formula (I): and their use in the treatment of bacterial infections.
这项发明涉及式(I)的化合物及其在治疗细菌感染中的应用。
Apparent Electrophilic Fluorination of 1,3-Dicarbonyl Compounds Using Nucleophilic Fluoride Mediated by PhI(OAc)<sub>2</sub>
作者:Toby J. Nash、Graham Pattison
DOI:10.1002/ejoc.201500370
日期:2015.6
The apparent electrophilicfluorination of 1,3-dicarbonylcompounds using Et3N·3HF as a nucleophilic fluoride source is reported. This reaction requires PhI(OAc)2 as oxidant and can be conducted safely in standard laboratory glassware. Alternative selectivity compared to Selectfluor was observed in some cases. This approach may reduce our reliance on difficult-to-handle fluorine gas and expensive electrophilic
[reaction: see text] Selective and effective fluorination of various types of organiccompounds performed in water as the reaction medium using 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (Selectfluor F-TEDA-BF4) is reported. 2-Naphthole and 2-methoxynaphthalene were thus transformed to 1,1-difluoro-2(1H)naphthalenone, estrone to 10beta-fluoro-1,4-estradien-3,17-dione
[反应:参见正文]使用1-氯甲基-4-氟-1,4-二氮杂双环[2.2.2]辛烷双(四氟硼酸酯)(Selectfluor F -TEDA-BF4)。因此,将2-萘酚和2-甲氧基萘转化为1,1-二氟-2(1H)萘酮,将雌酮转化为10β-氟-1,4-雌二醇-3,17-二酮,将苯基取代的烯烃转化为邻位氟代醇,和各种酮,1,3-二酮或β-酮酸酯,以形成相应的α-氟或α,α-二氟酮。