For faster navigation, this Iframe is preloading the Wikiwand page for 二(三氟乙酸)碘苯.

二(三氟乙酸)碘苯

二(三氟乙酸)碘苯
IUPAC名
Phenyl-λ3-iodanediyl bis(trifluoroacetate)
别名 双(三氟乙酸)碘苯
二(三氟乙酰氧基)碘苯
PIFA
识别
CAS号 2712-78-9  ☒N
PubChem 102317
ChemSpider 92428
SMILES
 
  • FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)c1ccccc1
InChI
 
  • 1/C10H5F6IO4/c11-9(12,13)7(18)20-17(6-4-2-1-3-5-6)21-8(19)10(14,15)16/h1-5H
InChIKey PEZNEXFPRSOYPL-UHFFFAOYAA
性质
化学式 C10H5F6IO4
摩尔质量 430.04 g·mol−1
危险性
GHS危险性符号
《全球化学品统一分类和标签制度》(简称“GHS”)中有害物质的标签图案
GHS提示词 Warning
H-术语 H315, H319, H335
P-术语 P261, P264, P271, P280, P302+352, P304+340, P305+351+338, P312, P321, P332+313, P337+313, P362, P403+233, P405
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

二(三氟乙酸)碘苯, 化学式 C
6
H
5
I(OCOCF
3
)
2
,是一种超价碘化合物英语hypervalent iodine,用作有机化学试剂。在酸性条件下,二(三氟乙酸)碘苯可以引起霍夫曼降解反应[1]

制备

[编辑]

所有的芳基超价碘化合物英语hypervalent iodine都是从碘苯开始合成的。二(三氟乙酸)碘苯可以通过碘苯和三氟过氧乙酸三氟乙酸的混合物反应而成。这个方法类似二(乙酸)碘苯英语(diacetoxyiodo)benzene的制备方法。[1]

它也可以由二(乙酸)碘苯和三氟乙酸加热反应而成:[2]

用处

[编辑]

二(三氟乙酸)碘苯可以把转化成重氮化合物,可用于巴顿–凯洛格反应。它也可以把缩硫醛转化成对应的羰基化合物。

霍夫曼降解反应

[编辑]

霍夫曼降解反应酰胺通过异氰酸酯中间体脱羰成的反应。这个反应通常在强碱性环境下发生。[3][4]

使用超价碘化合物可以使该反应在弱酸性条件下发生。[1]《有机合成》中发表的一个例子是由环丁基甲酸合成的环丁基甲酰胺转化成环丁胺的反应。[2]反应产生的伯胺三氟乙酸盐的形式存在,可以通过将其转化成盐酸盐来纯化。[1][2]

参考资料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 Aubé, Jeffrey; Fehl, Charlie; Liu, Ruzhang; McLeod, Michael C.; Motiwala, Hashim F. 6.15 Hofmann, Curtius, Schmidt, Lossen, and Related Reactions. Heteroatom Manipulations. Comprehensive Organic Synthesis II 6. 1993: 598–635. ISBN 9780080977430. doi:10.1016/B978-0-08-097742-3.00623-6. 
  2. ^ 2.0 2.1 2.2 (1988) "Hofmann Rearrangement Under Mildly Acidic Conditions Using [I,I-Bis(Trifluoroacetoxy)Iodobenzene: Cyclobutylamine Hydrochloride from Cyclobutanecarboxamide]". Org. Synth. 66; Coll. Vol. 8: 132. 
  3. ^ Wallis, Everett S.; Lane, John F. The Hofmann Reaction. Organic Reactions. 1946, 3 (7): 267–306. doi:10.1002/0471264180.or003.07. 
  4. ^ Surrey, Alexander R. Hofmann Reaction. Name Reactions in Organic Chemistry 2nd. Academic Press. 1961: 134–136 [2021-12-29]. ISBN 9781483258683. (原始内容存档于2021-12-29). 
{{bottomLinkPreText}} {{bottomLinkText}}
二(三氟乙酸)碘苯
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?