Chemoselective Cu-catalyzed synthesis of diverse <i>N</i>-arylindole carboxamides, β-oxo amides and <i>N</i>-arylindole-3-carbonitriles using diaryliodonium salts
Chemoselective copper-catalyzed synthesis of diverse N-arylindole-3-carboxamides, β-oxo amides and N-arylindole-3-carbonitriles from readily accessible indole-3-carbonitriles, α-cyano ketones and diaryliodonium salts has been developed. Diverse N-arylindole-3-carboxamides and β-oxo amides were successfully achieved in high yields under copper-catalyzed neutral reaction conditions, and the addition
Pd‐Catalyzed Carbonylative Synthesis of 4
<i>H</i>
‐Benzo[
<i>d</i>
][1,3]Oxazin‐4‐Ones Using Benzene‐1,3,5‐Triyl Triformate as the CO Source
作者:Yan Zheng、Mengke Dong、Erdong Qu、Jin Bai、Xiao‐Feng Wu、Wanfang Li
DOI:10.1002/chem.202103137
日期:2021.11.22
A Pd-catalyzed CO-free carbonylative synthesis of 4H-benzo[d][1,3]oxazin-4-one derivatives was developed. This new method employed readily available N-(o-bromoaryl)amides as the starting materials and inexpensive benzene-1,3,5-triyl triformate (TFBen) as the stable solid CO surrogate, which would not cause hydrodehalogenation of the starting materials. Remarkably, this method featured a very broad
开发了 Pd 催化的 4 H -benzo[ d ][1,3]oxazin-4-one 衍生物的无 CO 羰基化合成。这种新方法使用容易获得的N -(邻溴芳基)酰胺作为起始原料,使用廉价的三甲酸苯-1,3,5-三酯(TFBen)作为稳定的固体 CO 替代物,不会引起起始原料的加氢脱卤。值得注意的是,该方法具有非常广泛的底物范围,特别适用于将苯并[ d ][1,3]oxazin-4-one结构引入药物和天然生物活性化合物中。
Oxidative Recyclization of 1<i>H</i>-Indoles for Synthesis of 2-Indolylbenzoxazinones via Cleavage of the C2–C3 Bond with AIBN under Air
A novel and concise method for the oxidation of unprotected indole derivatives to synthesize 2-indolylbenzoxazinones in the presence of AIBN under open air has been successfully demonstrated. This metal-free reaction is both atom- and step-efficient and is applicable to a broad scope of substrates. This new methodology provides a facile pathway for oxidative C2-C3 bond cleavage and recyclization of 1H-indoles.
Ultraviolet Absorbent and Heterocyclic Compound
申请人:Amasaki Ichiro
公开号:US20090239982A1
公开(公告)日:2009-09-24
An ultraviolet absorbent represented by the following Formula (1) or (6):
wherein, Het
1
represents a monovalent five- or six-membered aromatic heterocyclic residue; X
a
and X
b
each independently represent a heteroatom; Y
a
to Y
c
each independently represent a heteroatom or a carbon atom; the ring formed from carbon atom, X
a
, X
b
, Y
a
to Y
c
may have a double bond at any position and has at least one fused ring;
wherein, Het
6
represents a monovalent five- or six-membered aromatic heterocyclic residue; X
6a
and X
6b
each independently represent a heteroatom; Y
6a
, Y
6b
and Y
6c
each independently represent a heteroatom or a carbon atom; L
6
represents a bi- to octa-valent connecting group; n is an integer of 2 or more, and m is an integer of 0 or more.