IF<sub>5</sub> affects the final stage of the Cl–F exchange fluorination in the synthesis of pentafluoro-λ<sup>6</sup>-sulfanyl-pyridines, pyrimidines and benzenes with electron-withdrawing substituents
A difficult chlorine–fluorine (Cl–F) exchange fluorination reaction in the final stage of the preparation of pentafluoro-λ6-sulfanyl-(hetero)arenes having electron-withdrawing substituents has now been elucidated through the use of iodinepentafluoride. A major side-reaction of C–S bond cleavage was sufficiently inhibited by the potential interaction between F and I with a halogen bonding.
Discovery of practical production processes for arylsulfur pentafluorides and their higher homologues, bis- and tris(sulfur pentafluorides): Beginning of a new era of “super-trifluoromethyl” arene chemistry and its industry
作者:Teruo Umemoto、Lloyd M Garrick、Norimichi Saito
DOI:10.3762/bjoc.8.53
日期:——
Various arylsulfur pentafluorides, ArSF(5), have long been desired in both academic and industrial areas, and ArSF(5) compounds have attracted considerable interest in many areas such as medicines, agrochemicals, and other new materials, since the highly stable SF(5) group is considered a "super-trifluoromethyl group" due to its significantly higher electronegativity and lipophilicity. This article
A novel strategy for the synthesis of arylsulfur pentafluorides by silver carbonate-induced Cl–F exchange fluorination of arylsulfur chlorotetrafluorides is reported. This fluorination does not require any exogenous fluoride sources. Rather, the reaction proceeds via the self-immolation of the substrate Ar-SF4Cl.
METHOD OF PRODUCING PENTAFLUOROSULFANYL AROMATIC COMPOUND
申请人:UBE INDUSTRIES, LTD.
公开号:US20200062709A1
公开(公告)日:2020-02-27
A method of producing a pentafluorosulfanyl aromatic compound is provided. A method of producing a pentafluorosulfanyl aromatic compound represented by general formula (3):
Ar—(SF
5
)
k
(3)
where Ar is a substituted or an unsubstituted aryl group or heteroaryl group, and k is an integer of 1 to 3;
the method includes reacting IF
5
with a halotetrafluorosulfanyl aromatic compound represented by general formula (2):
Ar—(SF
4
Hal)
k
(2)
where Ar and k are defined as above; and Hal is a Cl group, a Br group, or an I group.
提供了一种生产五氟硫基芳基化合物的方法。生产由通式(3)表示的五氟硫基芳基化合物的方法如下:
Ar—(SF
5
)
k
(3)
其中Ar是取代或未取代的芳基或杂环芳基,k是1到3的整数;
该方法包括将IF
5
与由通式(2)表示的卤代四氟硫基芳基化合物反应:
Ar—(SF
4
Hal)
k
(2)
其中Ar和k如上定义;Hal是氯基、溴基或碘基。
PROCESS FOR PRODUCING ARYLSULFUR PENTAFLUORIDES
申请人:UMEMOTO TERUO
公开号:US20080234520A1
公开(公告)日:2008-09-25
Novel processes for preparing arylsulfur pentafluorides are disclosed. Processes include reacting at least one aryl sulfur compound with a halogen and a fluoro salt to form an arylsulfur halotetrafluoride. The arylsulfur halotetrafluoride is reacted with a fluoride source to form a target arylsulfur pentafluoride.