PIDA-Mediated Oxidative C−C Bond Formation: Novel Synthesis of Indoles from <i>N</i>-Aryl Enamines
作者:Wenquan Yu、Yunfei Du、Kang Zhao
DOI:10.1021/ol900576a
日期:2009.6.4
A variety of functionalized indoles were synthesized from N-arylenaminesvia PIDA-mediated oxidative carbon−carbon bond formation. The features of the present reaction include facilitative preparation of substrates 2, good functional group tolerance, and mild reaction conditions without transition metals.
Copper-Catalyzed <i>N</i>-Arylation of Nitroenamines with Diaryliodonium Salts
作者:Klára Aradi、Ádám Mészáros、Balázs L. Tóth、Zoltán Vincze、Zoltán Novák
DOI:10.1021/acs.joc.7b01591
日期:2017.11.17
A novel synthetic methodology was developed for the N-arylation of nitroenamine derivatives utilizing diaryliodonium triflates and copper(I) chloride as a catalyst. The procedure enables the easy aryl transfer from the hypervalent species under mild catalytic conditions with unusual heteroatom preference and high efficiency.
Reaction of β-Nitro Enamines with Isocyanates, Isothiocyanates and Dimethyl Acetylenedicarboxylate
作者:Takao Tokumitsu
DOI:10.1246/bcsj.59.3871
日期:1986.12
β-Nitro enamines (1) reacted with isocyanates and isothiocyanates to give β-(substituted carbamoyl) and β-(substituted thiocarbamoyl) β-nitro enamines, respectively. The reaction of 1 with benzoyl isothiocyanate gave β-(benzoylthiocarbamoyl) β-nitro enamines (8) and/or a mixture of 8 and 4(1H)-pyrimidinethione derivatives (9) which were cyclization products of 8. The isolated 8 afforded the corresponding
Stereoselective Intermolecular Nitroaminoxylation of Terminal Aromatic Alkynes: Trapping Alkenyl Radicals by TEMPO
作者:Hong Yan、Guangwei Rong、Defu Liu、Yang Zheng、Jie Chen、Jincheng Mao
DOI:10.1021/ol5030585
日期:2014.12.19
The vinyl radical is one of the most unstable organic radicals. It is demonstrated that a nitro radical attacks phenylacetylene and makes the phenyl ring deconjugated with a double bond so that the resulting vinyl radical may be stabilized by delocalization to the phenyl rings p orbital and easily trapped by TEMPO. It is noteworthy that all desired products were obtained in moderate to good yields in an (E)-configuration.
Reaction of .beta.-nitroenamines with electrophilic reagents. Synthesis of .beta.-substituted .beta.-nitroenamines and 2-imino-5-nitro-4-thiazolines