N-Dealkylation-N-nitrosation of tertiary aromatic amines by N-butyl nitrite
作者:Giancarlo Verardo、Angelo G. Giumanini、Paolo Strazzolini
DOI:10.1016/s0040-4020(01)81940-2
日期:1991.9
nitrosation was never observed, but minor amounts of m- and p-nitro amines and/or nitrosamines were formed in some cases. Ring nitration is rather a reaction of the initial substrate than a process occurring on formed nitrosamines. The leaving propensities of the initial N-substituents to yield nitrosamines were in the order benzylmethyl alkyl.
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
Regioselective Synthesis of 2-Alkenylindoles and 2-Alkenylindole-3-carboxylates through the Cascade Reactions of <i>N</i>-Nitrosoanilines with Propargyl Alcohols
作者:Xia Song、Cai Gao、Bin Li、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.8b01098
日期:2018.8.3
In this paper, a novel and efficient synthesis of 2-alkenylindoles and 2-alkenylindole-3-carboxylates via the cascade reactions of N-nitrosoanilines with propargyl alcohols is presented. Mechanistically, the formation of the title compounds is triggered by a Rh(III)-catalyzed C(sp2)–H alkenylation of N-nitrosoaniline with propargyl alcohol followed by the simultaneous intramolecular amination/cyclization