85143-33-5Relevant academic research and scientific papers
Ru-Catalyzed [3 + 2] Cycloaddition of Nitrile Oxides and Electron-Rich Alkynes with Reversed Regioselectivity
Feng, Qiang,Huang, Hai,Sun, Jianwei
supporting information, p. 2431 - 2436 (2021/05/05)
Polarity reversal ("umpolung") of a functional group can override its inherent reactivity and lead to distinct bond-forming modes. Herein we describe a rarely studied cycloaddition between nitrile oxides and electron-rich alkynes with reversed regioselect
Radical-mediated sulfonyl alkynylation, allylation, and cyanation of propellane
Wu, Zhen,Xu, Yaohui,Zhang, Huihui,Wu, Xinxin,Zhu, Chen
supporting information, p. 6066 - 6069 (2021/06/21)
Bicyclo[1.1.1]pentane (BCP) is widely applied as the bioisostere for aryl, internal alkynes, andtert-butyl groups in medicinal chemistry. We herein disclose an efficient and practical preparation of sulfonyl alkynyl/allyl/cyano-substituted BCP derivatives
General Cu-Catalyzed Csp-S Coupling
Godin,Santandrea, Jeffrey,Caron, Antoine,Collins, Shawn K.
supporting information, p. 5905 - 5909 (2020/08/05)
Copper-catalyzed cross-coupling of thiols and bromoalkynes affords a mild, rapid, and selective Csp-S coupling with broad scope, enabling the use of aryl-, alkyl-, and silyl-substituted alkynyl coupling partners (38 total examples, 50-99percent yields). Importantly, the method enables the preparation of difficult-to-access bis-heteroatom-functionalized (S,S-, S,P-, and S,N-) alkynes.
Rhodium(I)-Catalyzed Regioselective Azide-internal Alkynyl Trifluoromethyl Sulfide Cycloaddition and Azide-internal Thioalkyne Cycloaddition under Mild Conditions
Song, Wangze,Zheng, Nan,Li, Ming,He, Junnan,Li, Junhao,Dong, Kun,Ullah, Karim,Zheng, Yubin
supporting information, p. 469 - 475 (2019/01/04)
A regioselective method to access fully substituted 5-trifluoromethylthio-1,2,3-triazoles and 5-thio-1,2,3-triazoles from the internal alkynyl trifluoromethyl sulfides and internal thioalkynes by a rhodium(I)-catalyzed azide-alkyne cycloaddition (RhAAC) reaction under mild conditions has been developed. This approach features good compatibility with water and air, a broad substrate scope, good functional group tolerance, high yields and excellent regioselectivities. The high 1,5-regioselectivities were controlled by the strong coordination between the sulfur atom and the π-acidic rhodium. The advantages of this method further include its applicability to gram-scale preparation, the use of solid-phase synthesis technique, and the mutually orthogonal CuAAC-RhAAC reaction. (Figure presented.).
Copper-catalyzed regioselective synthesis of (E)-β-fluorovinyl sulfones
Román, Raquel,Barrio, Pablo,Mateu, Natalia,Sedgwick, Daniel M.,Fustero, Santos
supporting information, (2019/05/02)
Organofluorine compounds are finding increasing application in a variety of fields such as pharmaceutical, agrochemical, and material sciences. However, given the scarcity of fluorine-containing natural products, advancement in this area depends almost entirely on the development of new synthetic methodologies. In this article, we present the synthesis of a series of previously undescribed (E)-β-fluorovinyl sulfones via a simple copper-catalyzed addition of hydrogen fluoride to alkynyl sulfone starting materials in varying yields and E/Z selectivities. The hydrogenation of these products was also explored and compared with the hydrogenation of the related Z isomers. These new products may find interesting applications, given the versatility of vinyl sulfones in chemical synthesis and the unique properties of vinyl fluorides in biological settings.
A Highly Regio- and Stereoselective Syntheses of α-Halo Enamides, Vinyl Thioethers, and Vinyl Ethers with Aqueous Hydrogen Halide in Two-Phase Systems
Cao, Wei,Chen, Ping,Wang, Liang,Wen, Hao,Liu, Yu,Wang, Wanshu,Tang, Yu
supporting information, p. 4507 - 4511 (2018/08/09)
A metal-free regio- and stereoselective method is achieved for the preparation of (E)-configured α-halo enamides, vinyl thioethers, and vinyl ethers using aqueous HX (X = F, Cl, Br, I), which features high functional group compatibility and regio- and stereoselectivity, mild conditions, high efficiency, and rapid transformation. Additionally, the isomers could be yielded readily from the (E)-configured α-halo enamides via photocatalysis or under Sonogashira coupling conditions.
Regiodivergent Rhodium(I)-Catalyzed Azide-Alkyne Cycloaddition (RhAAC) to Access Either Fully Substituted Sulfonyl-1,2,3-triazoles under Mild Conditions
Song, Wangze,Zheng, Nan,Li, Ming,Dong, Kun,Li, Junhao,Ullah, Karim,Zheng, Yubin
supporting information, p. 6705 - 6709 (2018/11/02)
A regiodivergent Rh(I)-catalyzed azide-alkyne cycloaddition (RhAAC) was developed for the synthesis of both fully substituted 4-sulfonyl-1,2,3-triazoles and 5-sulfonyl-1,2,3-triazoles in high regioselectivities and yields under mild conditions in one step
Alkynyl Thioethers in Gold-Catalyzed Annulations To Form Oxazoles
Reddy, Raju Jannapu,Ball-Jones, Matthew P.,Davies, Paul W.
supporting information, p. 13310 - 13313 (2017/10/07)
Non-oxidative, regioselective, and convergent access to densely functionalized oxazoles is realized in a functional-group tolerant manner using alkynyl thioethers. Sulfur-terminated alkynes provide access to reactivity previously requiring strong donor-substituted alkynes such as ynamides. Sulfur does not act in an analogous donor fashion in this gold-catalyzed reaction, thus leading to complementary regioselective outcomes and addressing the limitations of using ynamides.
A heterogeneous copper(I)-catalyzed aerobic oxidative cross-dehydrogenative coupling of terminal alkynes with thiols leading to alkynyl sulfides
Fang, Zhiqiang,He, Wen,Cai, Mingzhong,Lin, Yang,Zhao, Hong
supporting information, p. 6463 - 6467 (2015/11/16)
A heterogeneous copper-catalyzed direct oxidative cross-dehydrogenative coupling of terminal alkynes with thiols was achieved in DMSO at 70 °C in the presence of an MCM-41-supported bidentate nitrogen copper(I) complex [MCM-41-2N-CuCl] and K2CO
Lewis acid-promoted hydrofluorination of alkynyl sulfides to generate α-fluorovinyl thioethers
Bello, Davide,O'Hagan, David
supporting information, p. 1902 - 1909 (2016/04/10)
A new method for the preparation of α-fluorovinyl thioethers is reported which involves the hydrofluorination of alkynyl sulfides with 3HF·Et3N, a process that requires Lewis acid activation using BF3·Et2O and TiF4/s
