167781-50-2Relevant articles and documents
Intramolecular Reductive Cyclization of o-Nitroarenes via Biradical Recombination
Lu, Cong,Su, Zhishan,Jing, Dong,Jin, Songyang,Xie, Lijuan,Li, Liangrui,Zheng, Ke
supporting information, p. 1438 - 1443 (2019/03/07)
A visible-light-induced/thiourea-mediated intramolecular cyclization of o-nitroarenes under mild conditions is realized for the first time, which provides an efficient and environmentally friendly way to access pharmaceutical relevant quinazolinone derivatives. The reaction can be easily extended to gram level by using a continuous-flow setup with high efficiency. Mechanistic investigation including control experiments, transient fluorescence, UV-vis spectra, and DFT calculations suggests that the formation of active biradical intermediates via intramolecular single electron transfer (SET) is key stage in the catalytic cycle.
Metal-Free Synthesis of Polycyclic Quinazolinones Enabled by a (NH4)2S2O8-Promoted Intramolecular Oxidative Cyclization
Xie, Lijuan,Lu, Cong,Jing, Dong,Ou, Xinrui,Zheng, Ke
supporting information, p. 3649 - 3653 (2019/06/04)
An efficient metal-free, (NH4)2S2O8 mediated intramolecular oxidative cyclization for the construction of polycyclic heterocycles was disclosed. A series of polycyclic quinazolinone derivatives with good functional group tolerance were obtained in high yields. The natural products tryptanthrin and rutaecarpine, as well as their derivatives, were easily synthesized by this strategy. A preliminary mechanism study suggested the carbon-centered radical was involved in the catalytic cycle.
Facile synthesis and in vitro properties of 1-alkyl- and 1-alkyl-N-propargyl-1,2,3,4-tetrahydroisoquinoline derivatives on PC12 cells
Kitabatake, Michikazu,Nagai, Junko,Abe, Kenji,Tsuchiya, Yukihiro,Ogawa, Keita,Yokoyama, Takashi,Mohri, Kunihiko,Taguchi, Kyoji,Horiguchi, Yoshie
experimental part, p. 4034 - 4043 (2009/12/04)
The synthesis of several 1-alkyl-1,2,3,4-tetrahydroisoquinolines, which may play an important role in Parkinson's disease, has been achieved by modified Pictet-Spengler cyclization of the formyliminium ion. The direct cytotoxicity and preventative effects
Synthesis and in vitro cytotoxicity of 1,2,3,4-tetrahydroisoquinoline derivatives
Saitoh, Toshiaki,Abe, Kenji,Ishikawa, Masami,Nakatani, Masanao,Shimazu, Seiichiro,Satoh, Noriyuki,Yoneda, Fumio,Taguchi, Kyoji,Horiguchi, Yoshie
, p. 241 - 252 (2007/10/03)
Several 1-alkyl-1,2,3,4-tetrahydroisoquinoline (TIQ) derivatives, which may play a role in Parkinson's disease, have been synthesized via Pummerer-type cyclization of the sulfonium ion formed in situ from N-formyl sulfoxide. Using an in vitro trypan blue
Quinazoline deriviates for treating peptic ulcer
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, (2008/06/13)
A quinazoline derivative represented by formula(I) or a pharmaceutically acceptable salt thereof is useful for the treatment of peptic ulcer, wherein: STR1 R1 and R2 are each hydrogen or a C1 -C4 alkyl group; R3 is hydrogen or a halogen; R4, R5, R6, R7, R8 and R9, which may be the same or different, are each hydrogen, a C1 -C4 alkyl group, a cyclopropyl group, or a C1 -C4 alkyl group substituted with a halogen; and R10 is a methoxy group.