The reaction of dichlorocarbene with tertiary carboxamides
作者:Manuel Marcos、Jose L. Castro、Luis Castedo、Ricardo Riguera
DOI:10.1016/s0040-4020(01)87465-2
日期:1986.1
An easy method is described for the preparation of (E)-3-chloroacrylamides and α-chloromethylenelactams which is based on the simple treatment of tertiary carboxamides and lactams with dichlorocarbene.
The invention concerns a process for the preparation of substituted chloroacylanilides of the general formula: ##SPC1## Wherein R.sub.1 represents an alkyl group having from 1 to 4 carbon atoms or a phenyl group; R.sub.2 represents a hydrogen atom or halogen atom; R.sub.3 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and X.sub.1 and X.sub. 2 , which may be the same or different, represent a hydrogen atom, a halogen atom, a methyl group or an ethyl group. The process comprises acylating a substituted aniline of the general formula: ##SPC2## Wherein R.sub.1, X.sub.1 and X.sub.2 are as above defined, in the presence of phosphoryl chloride under substantially anhydrous conditions with a chlorocarboxylic acid of the general formula: ##EQU1## wherein R.sub.2 and R.sub.3 are as above defined. Particularly suitable compounds of general Formula II are N-methyl aniline and N-isopropyl aniline, and particularly suitable compounds of general Formula III are chloroacetic acid, dichloroacetic acid and .alpha.-chloropropionic acid and .alpha.-chlorobutyric acid. The compounds of general Formula I have phytotoxic effects and some are active herbicides.
Synthesis and Mechanistic Insights of the Formation of 3-Hydroxyquinolin-2-ones including Viridicatin from 2-Chloro-<i>N</i>,3-diaryloxirane-2-carboxamides under Acid-Catalyzed Rearrangements
作者:Vakhid A. Mamedov、Vera L. Mamedova、Zheng-Wang Qu、Hui Zhu、Venera R. Galimullina、Dmitry E. Korshin、Gul’naz Z. Khikmatova、Igor A. Litvinov、Shamil K. Latypov、Oleg G. Sinyashin、Stefan Grimme
DOI:10.1021/acs.joc.1c01592
日期:2021.10.1
duration of the reaction. A combined experimental and DFT mechanistic study of the formation of 1-benzyl-3-hydroxy-4-arylquinolin-2(1H)-ones showed that there are three competing reaction channels: (a) ring-closure via the ipso site, (b) ring-closure via the 1,2-Cl shift, and (c) ring-closure via the ortho site. Such mechanistic insights enabled an effective one-pot gram-scale synthesis of viridicatin
N -Benzyl-2-chloro - N ,3-diaryloxirane-2-carboxamides 在 Darzens 缩合条件下很容易从二氯乙酸的芳香醛和苯胺中获得,被证明是合成 3-羟基吲哚-2-酮的优良起始化合物, cyclohepto[ b ]pyrrole-2,3-diones 和 1-azaspiro[4.5]deca-3,6,9-triene-2-ones 通过 C(sp 2 )–C(sp 2 ) 键形成第一种情况和 C(sp 2 )–C(sp 3 ) 键在第二种和第三种情况下的形成。在优化的反应条件下,一锅法得到3-羟基吲哚-2-酮,其中包括N-苄基-2-氯-N的处理,3-二芳基环氧乙烷-2-甲酰胺与CF 3 CO 2 H 或AcOH/H 2 SO 4。在分子内环化的情况下,详细的反应通道强烈依赖于存在于苯胺组分和N-苄基-2-氯-N ,3-二芳基环氧乙烷-2-甲
Surfactant solutions for enhancing solubility of new arylquinolin-2-ones
作者:Alla B. Mirgorodskaya、Vakhid A. Mamedov、Lucia Ya. Zakharova、Farida G. Valeeva、Vera L. Mamedova、Venera R. Galimullina、Rushana A. Kushnasarova、Oleg G. Sinyashin
DOI:10.1016/j.molliq.2017.07.055
日期:2017.9
Micellarsolutions and microemulsions have been used for the increase in the solubility of a series of arylquinolin-2-ones in water. Using spectrophotometry, the solubilization capacity of systems has been characterized with respect to arylquinolin-2-ones. As micelle-forming compounds nonionic amphiphiles are used, whose application is approved in medicinal and pharmacological practice, namely, Tween