Novel aspects on the reaction of trialkyl-(1-methylindol-2-yl)borates
作者:Minoru Ishikura、Masanao Terashima
DOI:10.1039/c39890000135
日期:——
A new use of trialkyl-(1-methylindol-2-yl)borates for the synthesis of 2-substituted indoles involving the palladium catalysed cross-coupling with vinylic and aromatic halides, or a facile alkyl migration from boron to carbon without an additional electrophile is described.
Generation of Aryl Radicals from Aryl Halides: Rongalite-Promoted Transition-Metal-Free Arylation
作者:Fazhi Yu、Runyu Mao、Mingcheng Yu、Xianfeng Gu、Yonghui Wang
DOI:10.1021/acs.joc.9b01113
日期:2019.8.16
is reported. Rongalite as a novel precursor of super electron donors was used to initiate a series of electron-catalyzed reactions under mild conditions. These transition-metal-free radical chain reactions enable the efficient formation of C–C, C–S, and C–P bonds through homolytic aromatic substitution or SRN1 reactions. Moreover, the synthesis of antipsychoticdrug Quetiapine was performed on gram
Pd-catalyzed oxidative C–H/C–H cross-coupling of pyridines with heteroarenes
作者:Bo Liu、Yumin Huang、Jingbo Lan、Feijie Song、Jingsong You
DOI:10.1039/c3sc50348h
日期:——
We have developed for the first time a general, concise and highly selective method for the C2-heteroarylation of pyridines and related azines with a broad range of heteroarenes via a two-fold C–H activation, which streamlines the previous approaches that require the activated azine N-oxide as the coupling partner.
A unique copper-catalyzed cross-coupling reaction by hydrogen (H<sub>2</sub>) removal for the stereoselective synthesis of 3-phosphoindoles
作者:An-Xi Zhou、Liu-Liang Mao、Gang-Wei Wang、Shang-Dong Yang
DOI:10.1039/c4cc01815j
日期:——
The first Cu(i)-catalyzed cross-couplingreaction by hydrogen (H2) removal for the stereoselectivesynthesis of 3-phosphoindoles is reported. Going beyond the oxidative dehydrogenative coupling reactions reported recently, this reaction completely omits the oxidant and base, producing hydrogen (H2) as the only byproduct.
Investigation of the reaction of<i>N</i>-substituted indolylborates: Palladium catalyzed cross-coupling reactions and intramolecular alkyl migration reactions
作者:Minoru Ishikura、Isao Agata、Nobuya Katagiri
DOI:10.1002/jhet.5570360408
日期:1999.7
The palladium catalyzed cross-couplingreaction of indolylborates with various N-protecting groups was investigated, where N-Methyl, N-methoxy, and N-tert-butoxycarbonyl groups were found to be useful. However, triethyl(1-methoxymethylindol-2-yl)borate could not be used for this reaction. It was also found that the alkyl migration reaction of trialkyl(1-methoxymethylindol-2-yl)borate produced 2-alkyl-1-methyl-indole