[1]苯并噻吩并[2,3- c ]喹啉,[1]苯并噻吩并[2,3- c ] [1,2,4]三唑并[4,3- a ]喹啉和[1]苯并噻吩[ 2,3- c ]四唑[1,5- a ]喹啉
摘要:
3-氯-N-苯基苯并[ b ]噻吩-2-羧酰胺10的光环化反应得到[1]苯并噻吩并[2,3 - c ]-喹啉-6(5 H)-one 11,其被氯化为6-氯[1] ]苯并噻吩并[2,3- c ]喹啉12,然后脱氯得到[1]苯并噻吩并[2,3- c ]喹啉5。制备了一系列6-取代的烷氧基和硫代烷氧基[1]苯并噻吩并[2,3- c ]喹啉衍生物以及N-甲基季铵盐13 of 5。6-氯[1]-苯并噻吩并[2,3- c ]喹啉将12转化为6-肼基[1]苯并噻吩并[2,3- c ]喹啉23,经甲酸处理后生成[1]苯并噻吩并[2,3- c ] [1,2,4]三唑并[4,3] -一个]喹啉6。用亚硝酸处理23得到[1]苯并噻吩并[2,3- c ]四唑并[1,5- a ]喹啉7。化合物6和7是新颖的杂环系统。
COMPOUNDS HAVING PHOTOCHEMICALLY REMOVABLE PROTECTING GROUPS BASED ON AN ELECTROCYCLIC REACTION BETWEEN A CHROMOPHORE ATTACHED VIA AN ANILIDE GROUP TO A BENZOTHIOPHENE RING
申请人:MARQUETTE UNIVERSITY
公开号:US20130231484A1
公开(公告)日:2013-09-05
Disclosed herein are compounds having photoremovable protecting groups which are removed after the compounds absorbs light of a given wavelength and undergo an electrocyclic reaction between a chromophore in the compound attached via an anilide to a benzothiophene ring.
Pd-catalyzed dehydrogenative annulation approach for the efficient synthesis of phenanthridinones
作者:Xinyao Li、Jun Pan、Song Song、Ning Jiao
DOI:10.1039/c6sc01148a
日期:——
annulation of aryl iodides and aryl carbamic chlorides for the efficientsynthesis of phenanthridinone derivatives was developed. Simple aryl iodides and carbamic chlorides readily made from various anilines, a broad substrate scope with hetero/polycycles, as well as high-value products, make this direct dehydrogenative annulation approach very practical and attractive.
Photochemical electrocyclization and leaving group expulsion with a naphthothiophene-2-carboxanilide linked to a chromophore
作者:Lingzi Li、Gilbert N. Ndzeidze、Mark G. Steinmetz
DOI:10.1016/j.tet.2018.11.013
日期:2019.1
naphthiothiophene-2-carboxanilide bearing a leaving group at the C-3 position undergoes efficient electrocyclic ring closure and leaving group expulsion upon directphotolysis. The reaction occurs in the triplet excited state and can be sensitized by thioxanthone. Thioxanthone as chromophore can also be covalently attached to amide nitrogen by a trimethylene linker, and the photoreaction is equally efficient
Intramolecular Dehydrogenative Photocyclization of N-Phenyl-1-naphthamides
作者:Hao-Yuan Li、Xiaoying Niu、Shan-Shan Zhang、Shigang Shen、Qing-Yuan Meng、Xiu-Long Yang
DOI:10.1021/acs.orglett.4c01805
日期:2024.6.28
Here, we explore a dehydrogenative 6π photocyclization method for N-substituted naphthalene carboxamides, which can be conducted in air. This method employs DMSO as both the reaction solvent and oxidant while also stabilizing the excited state of the substrate. Furthermore, the addition of photosensitizer enables the reaction to proceed under a 440–445 nm LED source via energy transfer. The proposed
在这里,我们探索了一种N-取代萘甲酰胺的脱氢6π光环化方法,该方法可以在空气中进行。该方法采用DMSO作为反应溶剂和氧化剂,同时稳定底物的激发态。此外,光敏剂的添加使反应能够在 440-445 nm LED 光源下通过能量转移进行。所提出的机制最初通过 DFT 计算得到验证。
AlCl<sub>3</sub>-Catalyzed Intramolecular Cyclization of <i>N</i>-Arylpropynamides with <i>N</i>-Sulfanylsuccinimides: Divergent Synthesis of 3-Sulfenyl Quinolin-2-ones and Azaspiro[4,5]trienones
Switchable ortho/ipso-cyclization of N-arylpropynamides induced with N-sulfanylsuccinirnides as general sulfur reagents is reported. In the presence of MeOH, parafluoro N-arylpropynamides exclusively undergo the ipso-cyclization to give 3-sulfenyl azaspiro[4,5]trienones. Two kinds of bioactive heterocycles, benzothieno-[3,2-b]quinoline and 42,3-dquinolone, have been directly and efficiently prepared from the corresponding sulfenylated products.