Hydroheteroarylation of Unactivated Alkenes Using <i>N</i>-Methoxyheteroarenium Salts
作者:Xiaoshen Ma、Hester Dang、John A. Rose、Paul Rablen、Seth B. Herzon
DOI:10.1021/jacs.7b02388
日期:2017.4.26
reductive coupling of unactivated alkenes with N-methoxy pyridazinium, imidazolium, quinolinium, and isoquinolinium salts under hydrogen atom transfer (HAT) conditions, and an expanded scope for the coupling of alkenes with N-methoxy pyridinium salts. N-Methoxy pyridazinium, imidazolium, quinolinium, and isoquinolinium salts are accessible in 1-2 steps from the commercial arenes or arene N-oxides (25-99%)
Intermolecular Hydropyridylation of Unactivated Alkenes
作者:Xiaoshen Ma、Seth B. Herzon
DOI:10.1021/jacs.6b05271
日期:2016.7.20
A general method for the hydropyridylation of unactivatedalkenes is described. The transformation connects metal-mediated hydrogen atom transfer to alkenes and Minisci addition reactions. The reaction proceeds under mild conditions with high site-selectivities and allows for the construction of tertiary and quaternary centers from simple alkene starting materials.
Efficient protocol for the SO2F2-mediated deoxyfluorination of aliphatic alcohols
作者:Cayo Lee、Joey Lai、Maxim Epifanov、Cindy Xinyun Wang、Glenn M. Sammis
DOI:10.1016/j.jfluchem.2021.109888
日期:2021.11
the development of new synthetic methods to access these important fluorinated motifs. Herein we report the sulfuryl fluoride-mediated deoxyfluorination of alcohols using room temperature reaction conditions in only an hour. A wide range of primary aliphatic alcohols were efficiently converted to the corresponding fluoride in 46-70% isolated yields. Secondaryalcohols were also effectively deoxyfluorinated
Process for producing a vinylidene fluoride copolymer
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP0388172A1
公开(公告)日:1990-09-19
A process for producing a vinylidene fluoride copolymer, comprising the step of copolymerizing a mixture of monomers containing a polymerizable double bond comprising:
(A) vinylidene fluoride, and
(B) a fluorine compound represented by the formula:
CH₂=CH-Rf (I)
wherein Rf is a perfluoroalkyl group having 1 to 12 carbon atoms,
with the content of (B) being 0.1 to 50 % by weight, in the presence of a radical polymerization initiator. A vinylidene fluoride copolymer having excellent flexibility, impact resistance and cold resistance together with the good characteristics inherently possessed by polyvinylidene fluoride can be obtained.
Mild and Selective Activation and Substitution of Strong Aliphatic CF Bonds
作者:Mario Janjetovic、Annika M. Träff、Göran Hilmersson
DOI:10.1002/chem.201406097
日期:2015.2.23
chemoselectively manipulating the strong aliphatic CFbond with direct transformation into a CN bond under mild conditions is reported. The activation and subsequent substitution of primary alkylfluorides is mediated by La[N(SiMe3)2]3, and results in high to excellent yields of tertiary amines. The methodology displays high selectivity towards the C(sp3)Fbond, and a variety of secondary amines are applicable