A highly selective sp3 C–N cleavage of tertiary anilines was achieved using the TBN/TEMPO catalyst system. When N,N-diaklylanilines (alkyl, benzyl) were employed, the N–CH3 bond was selectively cleaved via radical C–Hactivation. Moreover, when the allyl group was installed, totally reverse selectivity was observed. It is worth noting that the solvent effect is also crucial to obtain high reaction
Rhodium-catalyzed oxidative C–H/C–H cross-coupling of aniline with heteroarene: <i>N</i>-nitroso group enabled mild conditions
作者:Shuang He、Guangying Tan、Anping Luo、Jingsong You
DOI:10.1039/c8cc04027c
日期:——
transition metal-catalyzed oxidative C–H/C–H cross-coupling between two (hetero)arenes to forge aryl-heteroaryl motifs under mild conditions is an appealing yet challenging task. Herein, we disclose a rhodium-catalyzed oxidative C–H/C–H cross-coupling reaction of an N-nitrosoaniline with a heteroarene under mild conditions. The judicious choice of the N-nitroso group as a directing group enables heightened
Electrophilic ipso-substitutions. Part 3. Reactions of 3-substituted indoles,4-substituted N,N-dimethylanilines, and 1- and 3-substituted indolizines with nitrous acid
作者:Martino Colonna、Lucedio Greci、Marino Poloni
DOI:10.1039/p29840000165
日期:——
Reactions of 3-substitutedindoles, N,N-dimethylanilines, and 1- and 3-substituted indolizines with nitrous acid yield products of ipso-substitutions, essentially the corresponding nitro-derivatives. An electron transfer process is proposed for the initial step, on the basis of reaction products, e.s.r. evidence, and substrate oxidation potentials.