已经探索了吲哚-2-甲酰胺与 2,3-环氧甲苯磺酸盐的碱介导[4+2]环化。该方案以非对映选择性方式以高产率提供 3-取代的吡嗪[1,2- a ]吲哚-1-酮,并且既不产生 4-取代的吡嗪[1,2- a ]吲哚-1-酮,也不产生四氢-1 H-无论远端环氧化物C3取代基是烷基还是芳基,或者环氧化物是顺式还是反式,都会生成[1,4]二氮杂[1,2- a ]吲哚-1-酮-配置。该反应通过用 2,3-环氧甲苯磺酸酯对吲哚支架进行 N-烷基化,同时进行 6-外选择性环氧化物开环反应,在一锅中进行。值得注意的是,该过程对于两种起始材料都具有化学和区域选择性。据我们所知,该过程代表了吲哚基二杂核亲核试剂与环氧化物基介电试剂一锅成环的第一个成功例子。
Synthesis of 6-Substituted 2-Pyrrolyl and Indolyl Benzoxazoles by Intramolecular <i>O</i>-Arylation in Photostimulated Reactions
作者:Victoria A. Vaillard、Javier F. Guastavino、María E. Budén、Javier I. Bardagí、Silvia M. Barolo、Roberto A. Rossi
DOI:10.1021/jo202386b
日期:2012.2.3
The synthesis of a series of 6-substituted 2-pyrrolyl and 2-indolyl benzoxazoles by photostimulated C–O cyclization of anions from 2-pyrrole carboxamides, 2-indole carboxamides, or 3-indole carboxamides has been found to proceed in good to excellent yields (41–100%) in DMSO and liquid ammonia. The pyrrole and indole carboxamides are obtained in good to very good isolated yields by an amidation reaction
An Atom-Economical Method for the Formation of Amidopyrroles Exploiting the Self-Assembled Resorcinarene Capsule
作者:Pellegrino La Manna、Carmen Talotta、Margherita De Rosa、Annunziata Soriente、Carmine Gaeta、Placido Neri
DOI:10.1021/acs.orglett.0c00529
日期:2020.4.3
Here is reported the first example of an organocatalyzed coupling between pyrrole and isocyanates in a nanoconfined space. The hexameric resorcinarene capsule C is able to catalyze the direct coupling between isocyanates and pyrroles to give amidopyrroles with excellent yields and selectivities. The reaction catalyzed by C prevents the use of expensive and poorly atom-economical reagents. As in natural
Substrate Controlled Regioselective Bromination of Acylated Pyrroles Using Tetrabutylammonium Tribromide (TBABr<sub>3</sub>)
作者:Shuang Gao、Travis K. Bethel、Tayeb Kakeshpour、Grace E. Hubbell、James E. Jackson、Jetze J. Tepe
DOI:10.1021/acs.joc.8b01251
日期:2018.8.17
Electrophilic bromination of pyrroles bearing carbonyl substituents at C-2 typically results in a mixture of the 4- and 5-brominated species, generally favoring the 4-position. Herein, we describe a substrate-controlled regioselective bromination in which tetra-butyl ammonium tribromide (TBABr3) reacts with pyrrole-2-carboxamide substrates to yield the 5-brominated species as the predominant (up to
作者:Jennifer A. Jacobsen、Jay R. Stork、Douglas Magde、Seth M. Cohen
DOI:10.1039/b921772j
日期:——
Boron difluoride adducts of diamidodipyrromethenes have been synthesized and characterized. The compounds represent a new group of the BODIPY family of fluorescent dyes. X-ray crystallography and solution 19F NMR experiments show that a persistent hydrogen bond is formed between the boron-bound fluoride groups and the peripheral amide substituents. The modular synthesis of these compounds and their robust photophysical properties suggest that they may be useful compounds for materials and biological photochemical applications.
ARYLOYL(OXY OR AMINO)PENTAFLUOROSULFANYLBENZENE COMPOUND, PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, AND PRODRUGS THEREOF
申请人:UBE INDUSTRIES, LTD.
公开号:US20160244407A1
公开(公告)日:2016-08-25
An aryloyl(oxy or amino)pentafluorosulfanylbenzene compound having pharmacological action. The aryloyl(oxy or amino)pentafluorosulfanylbenzene compound is represented by general formula (A-I), a pharmaceutically acceptable salt thereof, and a prodrug thereof,
wherein all of parameters represent the same meanings as defined in the specification.