[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。
Substrate Range of the Titanium TADDOLate Catalyzed Asymmetric Fluorination of Activated Carbonyl Compounds
作者:Andreas Bertogg、Lukas Hintermann、Dominique P. Huber、Mauro Perseghini、Maria Sanna、Antonio Togni
DOI:10.1002/hlca.201100375
日期:2012.3
4‐diazoniabicyclo[2.2.2]octane bis‐[tetrafluoroborate]) at room temperature. A series of α‐methylated β‐keto esters (3‐oxobutanoates, 3‐oxopentanoates) with bulky benzyl ester groups (60–90% ee) or phenyl ester (67–88% ee) have been fluorinated readily, whereas α‐acyl lactones were also readily fluorinated, but gave lower inductions (13–46% ee). Double stereochemical differentiation in β‐keto esters with chiral
[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。
Towards Greener Fluorine Organic Chemistry: Direct Electrophilic Fluorination of Carbonyl Compounds in Water and Under Solvent-Free Reaction Conditions
作者:Gaj Stavber、Stojan Stavber
DOI:10.1002/adsc.201000477
日期:2010.11.2
Selective and efficient fluorination of organic 1,3-dicarbonyl compounds was achieved using the electrophilic fluorinating reagents SelectfluorTMF-TEDA-BF4 (1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis-tetrafluoroborate) in aqueous medium or AccufluorTMNFSi (N-fluorobenzenesulfonimide) under solvent-free reaction conditions (SFRC). Under both reaction conditions cyclic 1,3-dicarbonyl