Silver-Catalyzed Decarboxylative Radical Addition/Cyclization of α,α-Difluoroarylacetic Acids with Acrylamides To Synthesize Difluorinated Oxindoles
作者:Yin-Long Li、Ji-Bo Wang、Xue-Lin Wang、Yang Cao、Jun Deng
DOI:10.1002/ejoc.201701248
日期:2017.11.2
silver-catalyzed decarboxylative radical addition/cyclizationreaction of α,α-difluoroarylacetic acids and acrylamides has been disclosed. The method provides a highly attractive approach to synthesize a series of difluorinated oxindoles that contain variousfunctional groups in moderate to good yields under mild conditions. Moreover, experimental studies reveal that the CF2 group of the α,α-difluoroarylacetic
under mild conditions. The extent of alkylation with alkyl bromides was found to be controlled by introducing Zn(OAc)2 as a bromide scavenger, ensuring the blocking of potential bromo-arene byproduct formation under photoredox conditions. In addition, a sequential C–H alkylation strategy for selective bis-alkylation has also been developed via chronological incorporation of different alkyl radical precursors
A substituted amide compound is useful as an active ingredient of a pharmaceutical composition, in particular a pharmaceutical composition for treating diseases caused by lysophosphatidic acid (LPA). The compound is of a formula:
In this formula, A is an optionally substituted aryl, etc.; B is an optionally substituted 5-membered aromatic hetero ring group; X is a single bond or —(CR
X1
R
X2
)
n
—; n is 1, 2, 3, or 4; R
X1
and R
X2
are hydrogen, etc.; Y
1
to Y
5
are each CR
Y
or N; each R
Y
is hydrogen, etc.; R
1
and R
2
are hydrogen, etc.; m is 1, 2, or 3; R
3
is hydrogen, etc.; and R
4
is an optionally substituted lower alkyl, etc.
一种替代酰胺化合物作为药物组合物的活性成分是有用的,特别是用于治疗由溶血磷脂酸(LPA)引起的疾病的药物组合物。该化合物的化学式如下:
在这个化学式中,A是可选地取代的芳基等;B是可选地取代的5-成员芳香杂环基团;X是单键或—(CR
X1
R
X2
)
n
—;n为1、2、3或4;R
X1
和R
X2
为氢等;Y
1
到Y
5
分别为CR
Y
或N;每个R
Y
为氢等;R
1
和R
2
为氢等;m为1、2或3;R
3
为氢等;R
4
为可选地取代的低碳烷基等。
Silver-catalyzed oxidative decarboxylation of difluoroacetates: efficient access to C–CF<sub>2</sub> bond formation
Ag(i)-catalyzed oxidative decarboxylative gem-difluoromethylenation of difluoroacetates with isonitriles has been developed for the formation of C–CF2 bonds.