<i>O</i>-Trifluoromethylation of Phenols: Access to Aryl Trifluoromethyl Ethers by <i>O</i>-Carboxydifluoromethylation and Decarboxylative Fluorination
作者:Min Zhou、Chuanfa Ni、Zhengbiao He、Jinbo Hu
DOI:10.1021/acs.orglett.6b01779
日期:2016.8.5
A new strategy for the synthesis of aryl trifluoromethyl ethers (ArOCF3) by combining O-carboxydifluoromethylation of phenols and subsequent decarboxylativefluorination is reported. This protocol allows easy construction of functionalized trifluoromethoxybenzenes and trifluoromethylthiolated arenes (ArSCF3) in moderate to good yields. Moreover, it utilizes accessible and inexpensive reagents sodium
Lipids as versatile solvents for chemical synthesis
作者:Ashot Gevorgyan、Kathrin H. Hopmann、Annette Bayer
DOI:10.1039/d1gc02311j
日期:——
Development of safe, renewable, cheap and versatile solvents is a longstanding challenge in chemistry. We show here that vegetable oils and related systems can become prominent solvents for organic synthesis. Suzuki–Miyaura, Hiyama, Stille, Sonogashira and Heck cross-couplings proceed with quantitative yields in a range of vegetable oils, fish oil, butter and waxes used as solvents. Appropriate methodologies
A compound represented by formula (I) or formula (II):
wherein, A represents an oxygen atom or a sulfur atom; X
1
represents a halogeno group, a substituted or unsubstituted C
1-6
alkyl group and so on; m represents the number of X
1
and is any integer of 0 to 5; any two of X
1
may be bound together to form a bivalent hydrocarbon group; Y represents a single bond or a substituted or unsubstituted C
2-6
alkenylene group; Q
1
represents a substituted or unsubstituted C
6-10
arylene group or a substituted or unsubstituted 6- to 10-membered heteroarylene group; Q
2
represents a substituted or unsubstituted C
6-10
aryl group or a substituted or unsubstituted 5- to 6-membered heteroaryl group; Z
q−
represents a counter ion; and q represents a valence of the counter ion and is 1 or 2.
Novel thiophene amidines, compositions thereof, and methods of treating complement-mediated diseases and conditions
申请人:Subasinghe Nalin
公开号:US20050234081A1
公开(公告)日:2005-10-20
Disclosed is a method for treating the symptoms of an acute or chronic disorder mediated by the classical pathway of the complement cascade, comprising administering to a mammal in need of such treatment a therapeutically effective amount of a compound of Formula (I) or a solvate, hydrate or pharmaceutically acceptable salt thereof; wherein R
1
, R
2
, R
3
, R
4
and R
7
are defined in the specification, Z is SO or SO
2
, and Ar is an aromatic or heteroaromatic group as defined herein.
Trifluoromethoxylation of Arynes Using 2,4‐Dinitro‐1‐(trifluoromethoxybenzene) as Trifluoromethoxide Anion Source
作者:L. Wisson、G. Hanquet、F. Toulgoat、T. Billard、A. Panossian、F. R. Leroux
DOI:10.1002/ejoc.202400388
日期:2024.7.22
on of arynes has been little reported in the literature mainly due to the limited number of stable trifluoromethoxide anion sources existing. We describe herein the trifluoromethoxylation of arynes using 2,4-dinitro-1-(trifluoromethoxy)benzene (DNTFB) as a cheap and easy-to-use source of F3CO−. The released trifluoromethoxide anion was used as both a source of fluoride to generate the aryne and a nucleophile
芳烃的三氟甲氧基化在文献中报道很少,这主要是由于现有的稳定的三氟甲氧基阴离子源的数量有限。我们在此描述了使用 2,4-二硝基-1-(三氟甲氧基)苯 (DNTFB) 作为廉价且易于使用的 F 3 CO − 来源的芳烃的三氟甲氧基化。释放的三氟甲氧基阴离子既用作产生芳基的氟化物源,又用作三氟甲氧基化反应的亲核试剂。