161038-18-2Relevant articles and documents
Copper-Catalyzed Direct C-5 Fluorination of 8-Aminoquinolines by Remote C-H Activation
Luo, Si-Si,Su, Lan-Jun,Jiang, Yue,Li, Xiao-Bao,Li, Zheng-Hui,Sun, Huan,Liu, Ji-Kai
, p. 1525 - 1529 (2018)
A convenient method was developed for direct regioselective fluorination of 8-aminoquinolines at the C-5 position by copper-catalyzed remote C-H activation using Selectfluor as the electrophile fluorinating reagent. With this method, diverse fluorinated quinoline derivatives were facilely obtained under mild conditions with moderate yields.
Auxiliary-assisted palladium-catalyzed halogenation of unactivated C(sp3)-H bonds at room temperature
Yang, Xinglin,Sun, Yonghui,Sun, Tian-Yu,Rao, Yu
supporting information, p. 6423 - 6426 (2016/05/24)
The direct transformation of unactivated C(sp3)-H bonds into C-halogen bonds was achieved by palladium catalysis at room temperature with good functional group tolerance. Some drugs and natural products were readily modified by this method. Merged with substitution reaction, newly formed C-X bonds can be transformed into diverse C-O, C-S, C-C and C-N bonds. A preliminary mechanism study demonstrates that solvent is crucial for C-H activation and the C-H activation step is involved in the rate-limiting step. An isolated Pd(ii) intermediate can be transformed into a halogenated product with the retention of conformation which suggests that concerted reductive elimination from Pd(iv) to form a C-X bond was favored.
Dual stimulatory and inhibitory effects of fluorine-substitution on mutagenicity: An extension of the enamine epoxide theory for activation of the quinoline nucleus
Saeki, Ken-Ichi,Kawai, Hiroshi,Kawazoe, Yutaka,Hakura, Atsushi
, p. 646 - 650 (2007/10/03)
Nineteen mono- and di-fluorinated derivatives of quinoline, 1,7- phenanthroline, 1,10-phenanthroline, benzo-[h]quinoline, and benzo[f]quinoline were subjected to analysis of their structure-mutagenicity relationships. For this purpose, six new fluorinated derivatives were synthesized. The results support that the enamine epoxide structure of the pyridine moiety, as well as the bay-region epoxide structure, is responsible for mutagenicity. Formation of K-region epoxides might involve a detoxification process rather than mutagenic activation.