114546-62-2Relevant articles and documents
Preparation method of water-soluble vitamin E participated conjugated diyne compound
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Paragraph 0112-0116, (2021/11/14)
The water-soluble vitamin E participates in the green preparation method of the conjugated diyne compound, the water serves as a reaction solvent, the use amount of the organic solvent is reduced, and zero emission of the solvent is realized. The excellent physicochemical properties of water are fully utilized, the reaction conditions are mild and efficient, the surfactant TPGS - 750 - M can be recycled through treatment, and the principle of environmental friendliness is completely met. The reaction substrate is wide in applicability, can catalyze the aryl alkyne, can catalyze the aliphatic hydrocarbon, and provides a simple and environment-friendly preparation method for the synthesis of the conjugated diyne. The copper catalyst which is more suitable for the reaction and reaction medium of the invention is screened out, and the yield is greatly improved.
Supporting a Cu@In2O3core-shell structure on N-doped graphitic carbon cuboctahedral cages for efficient photocatalytic homo-coupling of terminal alkynes
Han, Xiguang,Li, Qiuyan,Wang, Xiaojun,Wang, Ya-Qun,Yang, Feng-Lei,Yuan, Yaya,Zhuang, Guilin
supporting information, p. 24909 - 24914 (2021/11/27)
Improving the separation efficiency of photogenerated carriers and exposing more active sites are two important factors to improve the photocatalytic efficiency of photocatalysts. Designing appropriate materials with special structure and composition to a
Rh(III)-Catalyzed [3 + 2] Spirocyclization of 2 H-Imidazoles with 1,3-Diynes for the Synthesis of Spiro-[imidazole-indene] Derivatives
Luo, Yi,Liu, Hao,Zhang, Jing,Liu, Man,Dong, Lin
supporting information, p. 7604 - 7608 (2020/10/09)
An effective strategy to synthesize spirocyclic compounds, [imidazole-4,1′-indene], has been efficaciously developed relied on Rh(III)-catalyzed [3 + 2] spirocyclization of 2H-imidazoles and 1,3-diynes with excellent chemselectivity and regioselectivity.
Phosphorus(III)-Mediated, Tandem Deoxygenative Geminal Chlorofluorination of 1,2-Diketones
Choi, Garam,Chung, Won-Jin,Hwang, Sunjoo,Jang, Hanna,Kim, Ha Eun
supporting information, p. 4190 - 4195 (2020/06/27)
Tetrasubstituted carbon containing two different halogen substituents was constructed in a single-step operation by utilizing the carbene-like reactivity of dioxaphospholene through the tandem reaction of electrophilic and nucleophilic halogenating reagents. It was crucial to devise non-dealkylatable phosphoramidite, which enabled the efficient formation of geminal chlorofluorides from various 1,2-diketones with (PhSO2)2NF and n-Bu4NCl. In addition, selective functionalization of the chlorine substituent was demonstrated, and the absence of halogen scrambling was confirmed.
Metallomicelle catalyzed aerobic tandem desilylation/Glaser reaction in water
Tang, Shanyu,Li, Longjia,Ren, Xuanhe,Li, Jiao,Yang, Guanyu,Li, Heng,Yuan, Bingxin
supporting information, p. 2899 - 2904 (2019/06/17)
PEG-grafted nitrogen ligands were synthesized. The corresponding copper complexes serve as metallomicellar nanoreactors for the aerobic tandem desilylation/Glaser coupling of TMS-protected alkynes in water. The protocol is also suitable for base-free homocoupling of terminal alkynes. The metallomicellar catalyst could be recycled 5 times with minor loss of reactivity.
Stereoselective Synthesis of Highly Substituted Conjugated Dienes via Pd-Catalyzed Carbonylation of 1,3-Diynes
Liu, Jiawang,Yang, Ji,Baumann, Wolfgang,Jackstell, Ralf,Beller, Matthias
supporting information, p. 10683 - 10687 (2019/07/04)
The stereoselective synthesis of conjugated dienes was realized for the first time via Pd-catalyzed alkoxycarbonylation of easily available 1,3-diynes. Key to success is the utilization of the specific ligand 1,1′-ferrocenediyl-bis(tert-butyl(pyridin-2-yl)phosphine) (L1), which allows this novel transformation to proceed at room temperature. A range of 1,2,3,4-tetrasubstituted conjugated dienes are obtained in this straightforward access in high yields and selectivities. The synthetic utility of the protocol is showcased in the concise synthesis of several important intermediates for construction of natural products rac-cagayanin, rac-galbulin, rac-agastinol, and cannabisin G.
Unraveling the Mechanism of 1,3-Diyne Cross-Metathesis Catalyzed by Silanolate-Supported Tungsten Alkylidyne Complexes
Schnabel, Tobias M.,Melcher, Daniel,Brandhorst, Kai,Bockfeld, Dirk,Tamm, Matthias
supporting information, p. 9022 - 9032 (2018/06/29)
The benzylidyne complex [PhC≡W{OSi(OtBu)3}3] (1) catalyzed the cross-metathesis between 1,4-bis(trimethylsilyl)-1,3-butadiyne (2) and symmetrical 1,3-diynes (3) efficiently, which gave access to TMS-capped 1,3-diynes RC≡C?C≡CSiMesub
Polymer-Supported Cu–Nanoparticle as an Efficient and Recyclable Catalyst for Oxidative Homocoupling of Terminal Alkynes
Aziz, Sk Tarik,Islam, Rafique Ul
, p. 205 - 213 (2017/11/16)
Abstract: Copper nanoparticle on polyaniline support was synthesised by using in situ polymerisation and composite formation technique. This metal polymer nanocomposites material is found to be efficient for homocoupling of terminal alkynes which afford s
Continuous-flow oxidative homocouplings without auxiliary substances: Exploiting a solid base catalyst
?tv?s, Sándor B.,Georgiádes, ádám,Mészáros, Rebeka,Kis, Koppány,Pálinkó, István,Fül?p, Ferenc
, p. 90 - 99 (2017/03/15)
The catalytic oxidative dimerization of aromatic amines and acetylenes is of outstanding synthetic importance among homocoupling reactions. Both transformations necessitate the use of extraneous bases and ligands, which contains significant disadvantages as concerns environmental impacts and process costs. We exploited the inherent basic character of a copper-containing layered double hydroxide to facilitate the catalytic homocouplings of alkynes and aniline derivatives without the need for any auxiliary substances. The reactions were studied in a continuous-flow system to achieve extended parameter spaces for chemical intensification, and also to avoid undesired reaction pathways by means of strategic control over the residence time. Valuable 1,4-disubstituted 1,3-diynes and diversely substituted aromatic azo compounds were achieved chemoselectively in excellent yields and in short process times even on preparative scales.
Cobalt Catalyzed, Regioselective C(sp2)-H Activation of Amides with 1,3-Diynes
Kathiravan, Subban,Nicholls, Ian A.
supporting information, p. 4758 - 4761 (2017/09/23)
The development of a first row transition metal (cobalt)-based catalyst for the as yet unexplored C-H activation-driven reaction of 1,3-diynes, themselves a functional class of interest in a range of application areas, to form isoquinolinones - an importa