7091-13-6Relevant academic research and scientific papers
One-Pot Synthesis of 3-Halo-2-organochalcogenylbenzo[b]chalcogenophenes from 1-(2,2-Dibromovinyl)-2-organochalcogenylbenzenes
Luz, Eduardo Q.,Silvério, Gabriel L.,Seckler, Diego,Lima, David B.,Santana, Francielli S.,Barbosa, Ronilson V.,Montes D'Oca, Caroline R.,Rampon, Daniel S.
supporting information, p. 2610 - 2618 (2021/03/31)
A transition-metal-free one-pot synthesis of 3-halo-2-organochalcogenylbenzo[b]chalcogenophenes has been developed using 1-(2-organochalcogenylethynyl)-2-butylchalcogenylbenzenes generated in situ from 1-(2,2-dibromovinyl)-2-organochalcogenylbenzenes and
Non-conjugated anthracene derivatives and their mechanofluorochromic properties
Liu, Shuai,Liu, Lixia,Liang, Cheng,Peng, Ying,Huang, Shuangping,Li, Xiaotong,Sun, Meng,Wang, Xiaoji
, p. 3923 - 3931 (2018/06/19)
A series of non-conjugated methylene–anthracene Schiff base derivatives (DNCAs) were designed and synthesized. Photoluminescence emission spectra indicated that DNCA-4 and DNCA-12 showed obviously mechanofluorochromic properties, and distinctive 26- and 3
Natural α-methylenelactam analogues: Design, synthesis and evaluation of α-alkenyl-γ and δ-lactams as potential antifungal agents against Colletotrichum orbiculare
Delong, Wang,Lanying, Wang,Yongling, Wu,Shuang, Song,Juntao, Feng,Xing, Zhang
, p. 286 - 307 (2017/03/09)
In our continued efforts to improve the potential utility of the α-methylene-γ-lactone scaffold, 62 new and 59 known natural α-methylenelactam analogues including α-methylene-γ-lactams, α-arylidene-γ and δ-lactams, and 3-arylideneindolin-2-ones were synthesized as the bioisosteric analogues of the α-methylenelactone scaffold. The results of antifungal and cytotoxic activity indicated that among these derivatives compound (E)-1-(2, 6-dichlorobenzyl)-3-(2-fluorobenzylidene) pyrrolidin-2-one (Py51) possessed good selectivity with the highest antifungal activity against Colletotrichum orbiculare with IC50?=?10.4?μM but less cytotoxic activity with IC50?=?141.2?μM (against HepG2 cell line) and 161.2?μM (against human hepatic L02?cell line). Ultrastructural change studies performed by transmission electron microscope showed that Py51 could cause important cell morphological changes in C.?orbiculare, such as plasma membrane detached from cell wall, cell wall thickening, mitochondria disruption, a dramatic increase in vacuolation, and eventually a complete loss in the integrity of organelles. Significantly, mitochondria appeared one of the primary targets, as confirmed by their remarkably aberrant morphological changes. Analysis of structure–activity relationships revealed that incorporation of the aryl group into the α-exo-methylene and the N-benzyl substitution increased the activity. Meanwhile, the α-arylidene-γ-lactams have superiority in selectivity over the 3-arylideneindolin-2-ones. Based on the results, the N-benzyl substituted α-(2-fluorophenyl)-γ-lactam was identified as the most promising natural-based scaffold for further discovering and developing improved crop-protection agents.
Alkoxy substituted D-π-A dimethyl-4-pyrone derivatives: Aggregation induced emission enhancement, mechanochromic and solvatochromic properties
Cao, YuQi,Xi, Ye,Teng, XinYu,Li, Yang,Yan, Xilong,Chen, Ligong
, p. 75 - 83 (2016/10/25)
Three series of D-π-A 2,6-dimethyl-4-pyrone-cored derivatives were designed and synthesized. Evaluation by spectroscopic methods indicated that all the compounds exhibited aggregation-induced emission enhancement (AIEE) effect and solvatochromism. The experimental results revealed that the restriction of intramolecular rotation is the key element for showcasing the AIEE phenomenon. Moreover, all of the compounds presented red-shifted mechanochromic behavior, the extent of the red-shift was mainly dependent on the position and length of alkoxyl group. The PXRD and DSC profiles demonstrated a transformation from crystalline to amorphous state upon grinding. The D-A strategy introduced in this work could facilitate the development and application of ingenious mechanochromic materials.
A benchtop NMR spectrometer as a tool for monitoring mesoscale continuous-flow organic synthesis: Equipment interface and assessment in four organic transformations
Archambault, Cynthia M.,Leadbeater, Nicholas E.
, p. 101171 - 101177 (2016/11/09)
An approach is reported for monitoring continuous-flow reactions by means of a low-field benchtop NMR spectrometer. The spectrometer is interfaced with a mesofluidic reactor and used as a tool for optimising four organic transformations, namely an acid-catalysed esterification, a Knoevenagel condensation, a Diels-Alder reaction, and an alkylation. Reactions need to be performed either solvent-free or at relatively high concentration in order to monitor them effectively using the NMR spectrometer, but this allows for the leveraging of one of the key advantages of flow processing, namely process intensification.
Regulating the piezofluorochromism of 9,10-bis(butoxystyryl)anthracenes by isomerization of butyl groups
Xiong, Yao,Yan, Xilong,Ma, Yawen,Li, Yang,Yin, Guohui,Chen, Ligong
supporting information, p. 3403 - 3406 (2015/03/04)
Isomers of 9,10-bis(butoxystyryl)anthracene (DSA4), including n-butyl, i-butyl and t-butyl at ortho or para positions, were designed and synthesized. All of them display an aggregation-induced emission phenomenon. Remarkably, it was found that isomerization of butyl endgroups presents significant influences on their piezofluorochromic properties. Thus, an alternative approach to design and obtain piezofluorochromic compounds is proposed here.
Synthesis of 5-arylisoxazole-3-carboxylates derived from salicylaldehyde
Petkevich, S. K.,Dikusar, E. A.,Potkin, V. I.,Mikhei, I. V.
, p. 33 - 41 (2015/03/18)
A procedure has been developed for the synthesis of 5-arylisoxazole-3-carboxylates on the basis of phenols and oximes derived from salicylaldehyde. Selective reduction of 4-(2-ethoxybenzylideneaminophenyl) 5-arylisoxazole-3-carboxylates afforded the corresponding amines.
A green procedure for the oxidation of benzyl halides to aromatic aldehydes or ketones in aqueous media
Zheng, Pengwu,Yan, Li,Ji, Xiujie,Duan, Xuemin
experimental part, p. 16 - 19 (2011/02/27)
Green oxidation of benzyl halides to the corresponding aldehydes or ketones was achieved in aqueous media using trimethylamine N-oxide generated in situ from trimethylamine and H2O2. The yield of the reaction was excellent and the workup was simple. Copyright
The Dual Roles of Oxodiperoxovanadate Both as a Nucleophile and an Oxidant in the Green Oxidation of Benzyl Alcohols or Benzyl Halides to Aldehydes and Ketones
Li, Chunbao,Zheng, Pengwu,Li, Jie,Zhang, Hang,Cui, Yi,Shao, Qiyun,Ji, Xiujie,Zhang, Jian,Zhao, Pengying,Xu, Yanli
, p. 5063 - 5066 (2007/10/03)
One catalyst, two roles: VO(O2)2- reacts as a nucleophilic oxidant under acidic conditions towards benzyl alcohols. Altogether 15 alcohols have been oxidized, in the absence of organic solvent, in excellent yields. Benzyl halides are also oxidized by H2O 2 in water catalyzed by oxodiperoxovanadate and a phase transfer catalyst into aromatic aldehydes and ketones (see scheme). This reaction is the first green oxidation of benzyl halides.
A novel and efficient oxidation of benzyl alcohols to benzaldehydes with DMSO catalyzed by acids
Li, Chunbao,Xu, Yanli,Lu, Ming,Zhao, Zhuxuan,Liu, Lanjun,Zhao, Zheyuan,Cui, Yi,Zheng, Pengwu,Ji, Xioujie,Gao, Guangjie
, p. 2041 - 2042 (2007/10/03)
Oxidation of benzyl alcohols to the corresponding aldehydes was achieved by an acid catalyzed DMSO oxidation. When the oxidation was catalyzed by HBr, no side products were detected. In most cases, the yields were excellent. The oxidation rate depends on both the nature and the position of the substituents on the aromatic rings. A tentative mechanism is proposed for the oxidation.
