244056-94-8Relevant articles and documents
Synthesis and biological evaluation of isofebrifugine analogues
Zhang, Jinjin,Huang, Baohua,Lu, Yujing,Li, Wenbin,Zhuang, Zichong,Ke, Donghua,Zhong, Jingpeng,Zhou, Jinlin,Chen, Qian
, p. 1004 - 1010 (2019/11/22)
Isofebrifugine, as a kind of natural quinazolinone alkaloid with important physiological activities and good pharmacological effects, was isolated from a Chinese medicinal plant, Chang Shan (Dichroa febrifuga). In this paper, the synthesis of a series of novel isofebrifugine analogues was accomplished by employing the N-alkylation of 4(3H)-quinazolinones with benzyl (3aR,7aR)-rel-2-(bromomethyl)hexahydrofuro[3,2-b]pyridine-4(2H)carboxylates and the subsequent N-deprotection. These analogues were characterized by1 H NMR,13 C NMR and HRMS spectra. The MTT assay was used to examine the inhibitory effects of these analogues on the growth of human hepatoma cells (HepG2). The results indicated that some halogenated or hemiketal analogues showed interesting inhibition activity.
BF3·Et2O catalyzed diastereoselective nucleophilic reactions of 3-silyloxypiperidine N,O-acetal with silyl enol ether and application to the asymmetric synthesis of (+)-febrifugine
Liu, Ru-Cheng,Huang, Wei,Ma, Jing-Yi,Wei, Bang-Guo,Lin, Guo-Qiang
scheme or table, p. 4046 - 4049 (2009/10/11)
The asymmetric BF3·Et2O catalyzed nucleophilic reactions of 3-silyloxypiperidine N,O-acetal 10 with silyl enol ethers derived from ketones are described. (+)-Febrifugine 1, an antimalarial alkaloid, was successfully synthesized based
Asymmetric synthesis of antimalarial alkaloids (+)-febrifugine and (+)-isofebrifugine
Huang, Pei-Qiang,Wei, Bang-Guo,Ruan, Yuan-Ping
, p. 1663 - 1667 (2007/10/03)
Diastereoselective α,-amidoalkylation of N,O-acetal, derivated from controlled regio and diastereoselective reduction of (S)-N-(4-methoxybenzyl)-3-silyloxyglutarimide provided two diastereomeric 6-allyl-5-silyloxy-2-piperidinones in 76:24 selectivity. The transformation of the major diastereomer into a known advanced intermediate allowed the synthesis of (+)-febrifugine and (+)-isofebrifugine.