procedure for the synthesis of iodoarenes is developed which involves the sequential diazotization–iodination of aromatic amines with sodium nitrite, nanomagnetic supported sulfonic acid, and potassiumiodide under solvent-free conditions at room temperature.
Cu-Catalyzed Synthesis of Benzoxazole with Phenol and Cyclic Oxime
作者:Zheng-Hai Wang、Dong-Hui Wang
DOI:10.1021/acs.orglett.1c04322
日期:2022.1.21
A Cu-catalyzed straightforward synthesis of benzoxazoles from free phenols and cyclic oxime esters is reported. The mild reaction conditions tolerate various electron-withdrawing and electron-donating functional groups on both substrates, affording benzoxazoles in moderate to good yields. With this protocol, large-scale syntheses of Ezutromid and Flunoxaprofe in one or two steps are demonstrated. A
Transition‐Metal‐Free C(sp
<sup>2</sup>
)–C(sp
<sup>2</sup>
) Cross‐Coupling of Diazo Quinones with Catechol Boronic Esters
作者:Kai Wu、Liang‐Liang Wu、Cong‐Ying Zhou、Chi‐Ming Che
DOI:10.1002/anie.202006542
日期:2020.9.7
developed. With this protocol, a variety of biaryls and alkenyl phenols were obtained in good to high yields under mild conditions. The reaction tolerates various functionalities and is applicable to the derivatization of pharmaceuticals and natural products. The synthetic utility of the method was demonstrated by the short synthesis of multi‐substituted triphenylenes and three bioactive natural products
Intramolecular Fischer Indole Synthesis in Combination with Alkyne Hydroarylation: Synthesis of Tetracyclic Chromeno-indoles
作者:Jun Park、Sun-Young Kim、Ji-Eun Kim、Cheon-Gyu Cho
DOI:10.1021/ol4031638
日期:2014.1.3
Aryl hydrazides bearing a carbonyl function connected through an alkyne tether underwent an intramolecular Fischer indolization and alkynehydroarylation in a tandem fashion to afford novel tetracyclic chromeno-indoles. The accompanying isomerization of the 2H-chromene double bond can be avoided by stopping the tandem process at the indolophane stage and conducting the alkyne-hydroarylation reaction
Compounds of formula l:
wherein A, B and D are respectively selected from the group consisting of: (i) CH, NH, C; (ii) CH, N, N;and (iii) CH, O, C; are disclosed for use in inhibiting DNA-PK.