Enantioselective synthesis of N–C axially chiral indoles through chiral palladium-catalyzed 5-endo-hydroaminocyclization
摘要:
In the presence of (R)-SEGPHOS-PdCl2 catalyst, 5-endo-hydroaminocyclization of various 2-(tert-butyl)-N-(2-ethynylphenyl)anilines proceeds enantioselectively to afford optically active N-C axially chiral N-(2-tert-butylphenyl)indole derivatives in good yields. The enantioselectivity depends strongly on the bulkiness of ortho-substituents and the electron density on the arylethynyl group, and it is explained by the dynamic axial chirality generated by the twisting of the aryl substituent. (C) 2015 Elsevier Ltd. All rights reserved.
[EN] LIGHT-EMITTING DEVICE, ORGANIC COMPOUND AND DISPLAY<br/>[FR] DISPOSITIF ELECTROLUMINESCENT, COMPOSE ORGANIQUE ET AFFICHAGE
申请人:CANON KK
公开号:WO2005051046A1
公开(公告)日:2005-06-02
There are provided an organic light-emitting device having a light output of a high emission efficiency and a high luminance and having high durability and a novel organic compound that enables the device to be attained. An organic compound of a long fluorescence lifetime represented by an organic compound having, in a molecule, at least one partial structure comprising an unsubstituted or substituted indole ring and at least one partial structure comprising an unsubstituted or substituted carbazole ring is used in an organic light-emitting device.
Enantioselective synthesis of N–C axially chiral indoles through chiral palladium-catalyzed 5-endo-hydroaminocyclization
In the presence of (R)-SEGPHOS-PdCl2 catalyst, 5-endo-hydroaminocyclization of various 2-(tert-butyl)-N-(2-ethynylphenyl)anilines proceeds enantioselectively to afford optically active N-C axially chiral N-(2-tert-butylphenyl)indole derivatives in good yields. The enantioselectivity depends strongly on the bulkiness of ortho-substituents and the electron density on the arylethynyl group, and it is explained by the dynamic axial chirality generated by the twisting of the aryl substituent. (C) 2015 Elsevier Ltd. All rights reserved.