[EN] QUINOLONE COMPOUNDS AND PROCESS FOR PREPARATION THEREOF<br/>[FR] COMPOSÉS DE QUINOLONE ET LEUR PROCÉDÉ DE PRÉPARATION
申请人:COUNCIL OF SCIENT AND INDUSTRIAL RESEARCH AN INDIAN REGISTERED BODY INCORPORATED UNDER THE REGN OF S
公开号:WO2022044033A1
公开(公告)日:2022-03-03
The present invention relates to quinolones of formula (I) and process for its preparation by amine insertion into aryl-ynones thereof. [Formula I] The invention further relates to the process to obtain the natural products such as: graveoline, graveolinine, pseudane IV, pseudane VII, pseudane VIII and pseudane XII. The invention also describes the process for the total synthesis of waltherione F in concise approach from the quinolone synthesized. [Formula II]
Bromination of Arenes Using I<sub>2</sub>O<sub>5</sub>-KBr in Water
作者:Jieping Hou、Zejiang Li、Xiao-Dong Jia、Zhong-Quan Liu
DOI:10.1080/00397911.2013.796523
日期:2014.1.17
An efficient and environmentally benign bromination of various aromatic compounds using aN aqueous I2O5-KBr system at room temperature has been developed in this work. A series of aromatic compounds such as acetophenones, benzaldehydes, benzoic acids, anilines, amides, and aminopyridine have been successfully brominated in excellent regioselectivities and good yields under the typical reaction conditions. The features of KBr as brominating reagent, water as solvent, and mild conditions make this system an attractive synthetic procedure. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource(s): Full experimental and spectral details.]
BROMODECARBONYLATION AND BROMODECARBOXYLATION OF ELECTRON-RICH BENZALDEHYDES AND BENZOIC ACIDS WITH OXONE® AND SODIUM BROMIDE
作者:Bon-Suk Koo、Eun-Hoo Kim、Kee-Jung Lee
DOI:10.1081/scc-120005997
日期:2002.1
Benzaldehydes and benzoic acids bearing ortho- and para-electron donating substituents having unshared electron-pair have undergone bromodecarbonylation or bromodecarboxylation on treatment with sodium bromide in the presence of Oxone(R) in aqueous methanol.
Access to 2-Alkyl/Aryl-4-(1<i>H</i>)-Quinolones via Orthogonal “NH<sub>3</sub>” Insertion into <i>o</i>-Haloaryl Ynones: Total Synthesis of Bioactive Pseudanes, Graveoline, Graveolinine, and Waltherione F
An efficient one-pot synthesis of 4-(1H)-quinolones through an orthogonal engagement of diverse o-haloaryl ynones with ammonia in the presence of Cu(I), involving tandem Michael addition and ArCsp2-N coupling, is presented. The substrate scope of this convenient protocol, wherein ammonium carbonate acts as both an in situ ammonia source and a base toward diverse 2-substituted 4-(1H)-quinolones, has
Palladium-catalyzed ortho-C(sp2) H bromination of benzaldehydes via a monodentate transient directing group strategy
作者:Qiyun Yong、Bing Sun、Fang-Lin Zhang
DOI:10.1016/j.tetlet.2019.151263
日期:2019.11
developed to enable the palladium-catalyzed ortho-C(sp2)- H bromination of benzaldehydes. A broad scope of benzaldehydes were transformed into the desired products by employing 2-amino-5-chlorobenzotrifluoride as a monodentate transient directing group, demonstrating good functional group tolerance. Mild reaction conditions and no requirement for a silver salt are also features of this strategy.