A Regioselective Lithiation of 1-Methoxymethoxyindole at the 2-Position and Its Application for the Synthesis of 2-Substituted Indoles
摘要:
A regioselective lithiation of 1-methoxymethoxyindole at the 2-position was achieved with n-BuLi at 0-degrees-C. Subsequent treatment with electrophiles afforded 2-substituted 1-methoxymethoxyindoles, which were readily converted to 2-substituted indoles.
DBSA‐Catalyzed Regioselective Dehydrative Friedel‐Crafts Arylation of CF
<sub>3</sub>
‐Containing 3‐Indolyl(2‐thiophenyl)methanols with 2‐Substituted Indoles in Water
A green and efficient regioselectivedehydrativeFriedel‐Craftsarylation of trifluorinated 3‐indolyl(2‐thiophenyl) methanols with 2‐substitutedindoles, catalyzed by DBSA (dodecylbenzenesulfonic acid) in water is described. This simple and atom‐economical protocol features a unique regioselective 1,8‐addition, operational simplicity, mild conditions, excellent functional group compatibility, and environmental
Copper-catalyzed tandem <i>cis</i>-carbometallation/cyclization of imine-ynamides with arylboronic acids
作者:Hao-Ran Wang、En-He Huang、Chen Luo、Wen-Feng Luo、Yin Xu、Peng-Cheng Qian、Jin-Mei Zhou、Long-Wu Ye
DOI:10.1039/d0cc01424a
日期:——
An efficient copper-catalyzed tandem regioselective cis-carbometallation/cyclization of imine-ynamides with arylboronicacids has been developed. This method leads to a facile and practical synthesis of valuable 2,3-disubstituted indolines in moderate to excellent yields and features a broad substrate scope and wide functionalgroup tolerance. Other significant features of this protocol include the
Intramolecular addition of benzylic radicals onto ketenimines. Synthesis of 2-alkylindoles
作者:Mateo Alajarín、Angel Vidal、María-Mar Ortín
DOI:10.1039/b310593h
日期:——
The inter- and intramolecularaddition of free radicals onto ketenimines is studied. All the attempts to add intermolecularly several silicon, oxygen or carbon centered radicals to N-(4-methylphenyl)-C,C-diphenyl ketenimine were unsuccessful. In contrast, the intramolecularaddition of benzylic radicals, generated from xanthates, onto the central carbon of a ketenimine function with its N atom linked
Ga(OTf)<sub>3</sub>-Catalyzed Temperature-Controlled Regioselective Friedel–Crafts Alkylation of Trifluoromethylated 3-Indolylmethanols with 2-Substituted Indoles: Divergent Synthesis of Trifluoromethylated Unsymmetrical 3,3′-and 3,6′-Bis(indolyl)methanes
作者:Yuan Ling、Di An、Yuanyuan Zhou、Weidong Rao
DOI:10.1021/acs.orglett.9b01135
日期:2019.5.3
temperature-controlled regiodivergent alkylation of 2-substituted indoles with trifluoromethylated 3-indolylmethanols is described that provides structurally diverse unsymmetrical 3,3′- and 3,6′-bis(indolyl)methanes with a CF3-containing quaternary carbon center in good to excellent yields under mild conditions. In addition, this present protocol could be successfully extended to the synthesis of difluoromethylated