27104-55-8Relevant articles and documents
Copper(i)-catalyzed tandem synthesis of 2-acylquinolines from 2-ethynylanilines and glyoxals
Chu, Xiaoxiao,Jia, Jian,Liu, Gang,Liu, Xiguang,Wang, Guanghui,Yu, Mingwu,Zhao, Ximei
, p. 11811 - 11814 (2021/11/30)
An efficient one-step synthesis of 2-acylquinolines using a copper-catalyzed tandem reaction of 2-ethynylanilines with glyoxals in the presence of piperidine has been developed. This new protocol successfully avoids multi-step operation and the use of highly toxic cyanides required in traditional methods, and provides a practical tool for synthetic and pharmaceutical chemists. Various 2-acylquinolines are obtained with perfect regioselectivity in moderate to good yields (up to 86%). The potential synthetic utility of this method is exemplified by a large-scale experiment and synthetic transformation of the products.
Photochemical C?H Hydroxyalkylation of Quinolines and Isoquinolines
Bieszczad, Bartosz,Perego, Luca Alessandro,Melchiorre, Paolo
supporting information, p. 16878 - 16883 (2019/11/13)
We report herein a visible light-mediated C?H hydroxyalkylation of quinolines and isoquinolines that proceeds via a radical path. The process exploits the excited-state reactivity of 4-acyl-1,4-dihydropyridines, which can readily generate acyl radicals upon blue light absorption. By avoiding the need for external oxidants, this radical-generating strategy enables a departure from the classical, oxidative Minisci-type pattern and unlocks a unique reactivity, leading to hydroxyalkylated heteroarenes. Mechanistic investigations provide evidence that a radical-mediated spin-center shift is the key step of the process. The method's mild reaction conditions and high functional group tolerance accounted for the late-stage functionalization of active pharmaceutical ingredients and natural products.
Tributylmagnesium ate complex-mediated bromine-magnesium exchange of bromoquinolines: A convenient access to functionalized quinolines
Dumouchel, Sylvain,Mongin, Florence,Trécourt, Fran?ois,Quéguiner, Guy
, p. 2033 - 2035 (2007/10/03)
2-, 3- and 4-bromoquinolines were converted to the corresponding lithium tri(quinolyl)magnesates at -10°C by treatment with Bu3MgLi in THF or toluene. The resulting organomagnesium derivatives were quenched by various electrophiles to afford functionalized quinolines.