1361952-17-1Relevant academic research and scientific papers
Photocatalyzed Intramolecular [2+2] Cycloaddition of N-Alkyl-N-(2-(1-arylvinyl)aryl)cinnamamides
de Souza, Wanderson C.,Matsuo, Bianca T.,Matos, Priscilla M.,Correia, José Tiago M.,Santos, Marilia S.,K?nig, Burkhard,Paix?o, Marcio W.
supporting information, p. 3722 - 3728 (2021/02/03)
N-Alkyl-N-(2-(1-arylvinyl)aryl)cinnamamides are converted into natural product inspired scaffolds via iridium photocatalyzed intramolecular [2+2] photocycloaddition. The protocol has a broad substrate scope, whilst operating under mild reaction conditions. Tethering four components forming a trisubstituted cyclobutane core builds rapidly high molecular complexity. Our approach allows the design and synthesis of a variety of tetrahydrocyclobuta[c]quinolin-3(1H)-ones, in yields ranging between 20–99 %, and with excellent regio- and diastereoselectivity. Moreover, it was demonstrated that the intramolecular [2+2]-cycloaddition of 1,7-enynes—after fragmentation of the cyclobutane ring—leads to enyne-metathesis-like products.
Palladium(ii)-catalyzed vinylic geminal double C-H activation and alkyne annulation reaction: Synthesis of pentafulvenes
Phukon, Jyotshna,Gogoi, Sanjib
supporting information, p. 1133 - 1136 (2020/02/04)
The first transition-metal-catalyzed vinylic geminal double C(sp2)-H activation and di-substituted alkyne annulation reaction is reported. This palladium(ii)-catalyzed, amide directed reaction of vinylic compounds with di-substituted alkynes offers an efficient synthetic path to pentafulvenes, which are very important compounds because of their bioactivity and interesting optical properties. A FeCl3-mediated transformation of pentafulvenes to fluorescent cyclopenta[b]quinolines is also developed.
Mn(III)-Mediated Regioselective 6-endo-trig Radical Cyclization of o-Vinylaryl Isocyanides to Access 2-Functionalized Quinolines
Liu, Yan,Li, Shi-Jun,Chen, Xiao-Lan,Fan, Lu-Lu,Li, Xiao-Yun,Zhu, Shan-Shan,Qu, Ling-Bo,Yu, Bing
supporting information, p. 688 - 694 (2020/01/02)
A Mn(III)-mediated radical cyclization reaction of o-vinylaryl isocyanides and arylboronic acids or diphenylphosphine oxides to access various 2-functionalized quinolines under mild conditions was developed. With the introduction of radical stabilizing substituents (e. g. aryl and methyl group) on vinyl group, this reaction provides a regiospecific 6-endo-trig radical cyclization of o-vinylaryl isocyanides, giving a number of structurally unique and biologically potential 2-functionalized quinoline derivatives.
Palladium-Catalyzed Phosphoryl-Carbamoylation of Alkenes: Construction of Nonbenzylic C(sp3)?P(O)R2 Bonds via C(sp3)?Pd(II)?P(O)R2 Reductive Elimination
Chen, Chen,Sun, Wan,Yan, Yan,Yang, Fang,Wang, Yuebo,Zhu, Yan-Ping,Liu, Liying,Zhu, Bolin
supporting information, p. 2970 - 2975 (2020/07/06)
We report the first example of palladium-catalyzed phosphoryl-carbamoylation of alkene-tethered carbamoyl chlorides with P(O)H compounds. Both H-phosphinates and secondary phosphine oxides are compatible with this reaction. DPE-Phos was used as ligand to facilitate nonbenzylic C(sp3)?P bonds formations via C(sp3)?Pd(II)?P reductive elimination. By using this protocol, a range of phosphorylated oxindoles and lactams were obtained in moderate to good yields. (Figure presented.).
Palladium-Catalyzed/Copper-Mediated Desulfurization and Aryl- ation of Quinoline-2-(1 H)-thione for Rapid Access to Quinoline Derivatives
Guo, Fu-Hu,Lu, Hai-Long,Quan, Zheng-Jun,Wang, Tong-Lin,Wang, Xi-Cun
supporting information, p. 893 - 900 (2020/03/13)
An efficient method for carbon-carbon bond formation is described. The process employs the palladium-catalyzed and copper-mediated cross-coupling of quinoline-2-(1 H)-thiones with arylboronic acids or alkynes through C-S bond cleavage without an inert atm
Chemo- And Regioselective Magnesium-Catalyzed ortho-Alkenylation of Anilines
Chatupheeraphat, Adisak,Rueping, Magnus,Magre, Marc
supporting information, p. 9153 - 9157 (2019/11/14)
A simple and efficient catalytic system for a chemo- and regioselective ortho-alkenylation of anilines is presented. The new magnesium-catalyzed reaction allows the use of a wide range of alkynes and anilines with different electronic and steric propertie
Cleavage of C-C Bonds for the Synthesis of C2-Substituted Quinolines and Indoles by Catalyst-Controlled Tandem Annulation of 2-Vinylanilines and Alkynoates
Ni, Jixiang,Jiang, Yong,An, Zhenyu,Yan, Rulong
supporting information, p. 1534 - 1537 (2018/03/23)
The strategy for the synthesis of C2-substituted indoles and quinolines from 2-vinylanilines and alkynoates through C-C bond cleavage is developed. With these general methods, 2-substituted indoles and quinolines can be accessed via tandem Michael addition and cyclization with no requirement of oxidant. This strategy not only provides a method for the synthesis C2-substituted indoles in good yields through the simultaneous cleavage of C=C and C=C bonds under metal-free conditions but also provides a simple method for the generation of the C2-substituted quinolines in moderate yields via Pd-catalyzed C=C bond cleavage.
Base-catalyzed thio-lactamization of 2-(1-arylvinyl)anilines with CS2 for the synthesis of quinoline-2-thiones
Wang, Tong-Lin,Liu, Xiao-Jun,Huo, Cong-De,Wang, Xi-Cun,Quan, Zheng-Jun
supporting information, p. 499 - 502 (2018/01/19)
Here we show that the base-catalyzed thio-lactamization of 2-(1-arylvinyl)anilines with CS2 is a powerful methodology to synthesize quinoline-2-thiones. This thio-lactamization uses inexpensive and versatile 2-(1-arylvinyl)anilines, which are easily available from the reaction of amines and alkynes. Compared to the known strategy in the literature, this method features the advantages like a short synthesis step and easily available starting materials.
Base-controlled chemoselectivity reaction of vinylanilines with isothiocyanates for synthesis of quinolino-2-thione and 2-aminoquinoline derivatives
Zhang, Xi,Wang, Tong-Lin,Huo, Cong-De,Wang, Xi-Cun,Quan, Zheng-Jun
supporting information, p. 3114 - 3117 (2018/03/28)
Here, we report a base-controlled chemo-selective reaction of vinylanilines with alkyl/aryl isothiocyanates to afford quinolino-2-thione and 2-aminoquinoline derivatives. The quinolino-2-thiones could be obtained in high yields in the presence of Et3N. Particularly interesting is that the reaction could produce the 2-aminoquinolines in the presence of K3PO4 with high selectivity.
Copper-mediated intramolecular aza-Wacker-type cyclization of 2-alkenylanilines toward 3-aryl indoles
Yang, Rui,Yu, Jin-Tao,Sun, Song,Zheng, Qingheng,Cheng, Jiang
supporting information, p. 445 - 448 (2017/01/11)
A copper-mediated intramolecular aza-Wacker-type cyclization was developed for the direct and efficient synthesis of 3-aryl indoles using 2-alkenylanilines in moderate to good yields with good functional group compatibility. This strategy shows the high efficiency, operational simplicity as well as broad substrate scope.
