Benziodoxole Triflate as a Versatile Reagent for Iodo(III)cyclization of Alkynes
作者:Bin Wu、Junliang Wu、Naohiko Yoshikai
DOI:10.1002/asia.201701530
日期:2017.12.14
Hyperactive: A benziodoxole triflate promotes iodo(III)cyclization of alkynes tethered to a variety of nucleophilic moieties, affording benziodoxole-appended (hetero)arenes such as benzofurans, benzothiophenes, isocoumarins, indoles, and polyaromatics. These unprecedented (hetero)aryl-IIII compounds are easy to purify, air- and thermally stable, and amenable to various synthetic transformations.
Efficient Synthesis of Fluoren-9-ones by the Palladium-Catalyzed Annulation of Arynes by 2-Haloarenecarboxaldehydes
作者:Jesse P. Waldo、Xiaoxia Zhang、Feng Shi、Richard C. Larock
DOI:10.1021/jo8009215
日期:2008.9.1
Fluoren-9-ones and derivatives are readily prepared in good yields by the annulation of in situ generated arynes by 2-haloarenecarboxaldehydes in the presence of a palladium catalyst.
Synthesis of fluorenones viaquaternary ammonium salt-promoted intramolecular dehydrogenative arylation of aldehydes
作者:Zhuangzhi Shi、Frank Glorius
DOI:10.1039/c2sc21823b
日期:——
Biologically interesting fluorenone, xanthone and anthrone derivatives have been prepared via an intramolecular oxidative acylation process. This novel direct acylation reaction proceeded without the aid of any transition metals, acids or bases, and uses a catalytic amount of a quaternary ammonium salt in the presence of a persulfate oxidant. Initial mechanistic studies have been carried out to elucidate
Palladium-catalyzed cyclocarbonylation of cyclic diaryliodoniums: Synthesis of fluorenones
作者:Li Liu、Jian Qiang、Shuhua Bai、Yang Li、Chunbao Miao、Jian Li
DOI:10.1002/aoc.3817
日期:2017.12
An efficient approach to the synthesis of fluorenones via the palladium‐catalyzed cyclocarbonylation of cyclic diaryliodoniums was developed. Our route enables facile access to fluorenones with various substituents in modest to high yields.
Synthesis of Fluoren-9-ones by the Palladium-Catalyzed Cyclocarbonylation of <i>o</i>-Halobiaryls
作者:Marino A. Campo、Richard C. Larock
DOI:10.1021/jo020140m
日期:2002.8.1
The synthesis of various substituted fluoren-9-ones has been accomplished by the palladium-catalyzed cyclocarbonylation of o-halobiaryls. The cyclocarbonylation of 4'-substituted 2-iodobiphenyls produces very high yields of 2-substituted fluoren-9-ones bearing either electron-donating or electron-withdrawing substituents. 3'-Substituted 2-iodobiphenyls afford 3-substituted fluoren-9-ones in excellent