Rhodium(III)-Catalyzed Direct C–H Arylation of Various Acyclic Enamides with Arylsilanes
作者:Xiaolan Li、Kai Sun、Wenjuan Shen、Yong Zhang、Ming-Zhu Lu、Xuzhong Luo、Haiqing Luo
DOI:10.1021/acs.orglett.0c03578
日期:2021.1.1
The stereoselective β-C(sp2)–H arylation of various acyclic enamides with arylsilanes via Rh(III)-catalyzed cross-coupling reaction was illustrated. The methodology was characterized by extraordinary efficacy and stereoselectivity, a wide scope of substrates, good functional group tolerance, and the adoption of environmentally friendly arylsilanes. The utility of this present method was evidenced by
Construction of Pyridine Ring Systems by Mn(OAc)
<sub>2</sub>
‐Promoted Formal Dehydrative Dehydroaromatizing [4+2] Cycloaddition of Enamides with Maleimides
作者:Xiaolan Li、Xiuqi Zhang、Fukuan Zhang、Xuzhong Luo、Haiqing Luo
DOI:10.1002/adsc.202200251
日期:2022.5.17
dehydroaromatizing [4+2] cycloaddition of enamides with maleimides for the construction of pyridine rings to access the diverse synthetically valuable pyrrolo[3,4-c]-pyridine derivatives. This protocol allows two C−C bond formation for the assembly of pyridine derivatives from enamides synthesizable in two steps and inexpensive maleimides, which exhibits broad substrate scope and good functional group compatibility
Electrochemically Induced Regio‐ and Stereoselective (
<i>E</i>
)‐β‐C(
<i>sp</i>
<sup>2</sup>
)−H Trifluoromethylation and Arylsulfonylation of Enamides
作者:Fukuan Zhang、Xuefei Zhao、Jie Zhang、Lili Zhao、Lin Li、Jiayi Yang、Hao Li、Haiqing Luo
DOI:10.1002/adsc.202200934
日期:2022.12.8
electrochemically induced method for the regio- and stereoselective (E)-β-C(sp2)−H trifluoromethylation of enamides by employing readily available and inexpensive Langlois’ reagent (CF3SO2Na). Preliminary mechanistic studies indicate the involvement of free radicals in the process. The exogenous oxidant-free reaction proceeds in an undivided electrochemical cell under mild conditions and allows for the accomplishment
在此,我们公开了一种电化学诱导的区域选择性和立体选择性 ( E )-β-C( sp 2 )-H 三氟甲基化的方法,使用现成且廉价的 Langlois 试剂 (CF 3 SO 2 Na)。初步的机理研究表明自由基参与了这个过程。无外源氧化剂的反应在温和条件下在未分隔的电化学电池中进行,并允许通过独家E选择性控制完成三氟甲基化产物。该方法的特点是无催化剂、设置简单、烯酰胺底物范围广、官能团耐受性好。使用 ArSO 2Na 作为偶联配偶体,在标准反应条件下得到相应的 ( E )-β-C( sp 2 )−H 芳基磺酰化烯酰胺产物。
Selective Cross-Dehydrogenative Coupling of Various Acyclic Enamides with Heteroarenes via Rh(III)-Catalyzed C–H Activation
作者:Xiaolan Li、Haiqing Luo、Ruixin Song、Yuting Zhang、Xian Gong、Hu Cai、Xuzhong Luo
DOI:10.1021/acs.orglett.3c01786
日期:2023.7.21
describes an efficient Rh(III)-catalyzed oxidative C–H/C–H cross-coupling between acyclic enamides and heteroarenes. This cross dehydrogenative coupling (CDC) reaction offers advantages, including excellent regioselectivity and stereoselectivity, good functional group compatibility, and a broad substrate scope. Mechanistically, Rh(III)-catalyzed β–C(sp2)–H activation of acyclic enamides is proposed