We disclose a direct C(sp)–, C(sp2)–, and C(sp3)–H thiolation reaction using β-sulfinylesters as the versatile sulfur source. The key step of this protocol is chemoselective C–S bond cleavage of the sulfoniumsalts that are formed in situ from the corresponding alkenes, alkynes, and 1,3-dicarboxyl compounds with β-sulfinylesters. The successful capture of the acrylate byproduct supports a retro-Michael
Highly dispersed Ni<sub>2</sub>P nanoparticles on N,P-codoped carbon for efficient cross-dehydrogenative coupling to access alkynyl thioethers
作者:Tao Song、Peng Ren、Jianliang Xiao、Youzhu Yuan、Yong Yang
DOI:10.1039/c9gc04137k
日期:——
A Ni2P nanoparticle dispersed on N,P-codoped carbon material was developed for efficient synthesis of alkynyl thioethers via a cross-dehydrogenative coupling (CDC) strategy under base- and ligand-free conditions using air as the oxidant.
Cu(i)-catalyzed aerobic cross-dehydrogenative coupling of terminal alkynes with thiols for the construction of alkynyl sulfides
作者:Yong Yang、Weibing Dong、Yisong Guo、Robert M. Rioux
DOI:10.1039/c3gc41330f
日期:——
and selective aerobiccross-dehydrogenativecoupling of terminalalkynes with thiols to construct alkynyl sulfides catalyzed by Cu(I) using molecular oxygen as the oxidant has been demonstrated under mild reaction conditions. The process is applicable to a wide range of alkynes and various thiols and is compatible with a variety of functional groups on both alkyne and thiol coupling partners.
Ru-Catalyzed [3 + 2] Cycloaddition of Nitrile Oxides and Electron-Rich Alkynes with Reversed Regioselectivity
作者:Qiang Feng、Hai Huang、Jianwei Sun
DOI:10.1021/acs.orglett.1c00273
日期:2021.4.2
reactivity and lead to distinct bond-forming modes. Herein we describe a rarely studied cycloaddition between nitrileoxides and electron-rich alkynes with reversed regioselectivity, leading to the useful 4-heterosubstituted isoxazoles. The use of a ruthenium catalyst completely overrides the inherent polarity of nitrileoxides. This reversed regioselectivity was also observed for their reactions with a range
A heterogeneous copper-catalyzed direct oxidative cross-dehydrogenativecoupling of terminalalkynes 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 K2CO3 under an atmosphere of O2, yielding selectively a variety of alkynyl sulfides in good to excellent yields. This heterogeneous copper catalyst can be easily
在MSO-41负载的双齿氮铜(I)络合物[MCM-41-2N-CuCl]的存在下,在DMSO中于70°C的条件下,末端炔烃与硫醇的异质铜催化直接氧化交叉脱氢偶联反应和在O 2气氛下的K 2 CO 3,以良好至优异的产率选择性地产生各种炔基硫化物。该多相铜催化剂可通过简单的过滤容易地回收并循环10次而活性没有降低。