Reactions of indoles with nitrogen dioxide and nitrous acid in an aprotic solvent
作者:Paola Astolfi、Maria Panagiotaki、Corrado Rizzoli、Lucedio Greci
DOI:10.1039/b607680g
日期:——
The reaction of 2-phenyl- and 1-methyl-2-phenylindole with nitrogen dioxide or with nitrous acid (NaNO2-CH3COOH) in benzene leads mainly to the formation of the isonitroso and 3-nitroso indole derivatives, respectively. When reacted with nitrous acid, 1-methyl-2-phenylindole gives also the corresponding azo-bis-indole in good yields. The reaction of indole with nitrogen dioxide leads to 2-(indol-3-yl)-3H-indol-3-one
2-苯基-和1-甲基-2-苯基吲哚与二氧化氮或与亚硝酸(NaNO2-CH3COOH)在苯中的反应分别分别导致异亚硝基和3-亚硝基吲哚衍生物的形成。当与亚硝酸反应时,1-甲基-2-苯基吲哚也以良好的收率得到相应的偶氮-双吲哚。吲哚与二氧化氮的反应导致以2-(吲哚-3-基)-3H-吲哚-3-酮为主要产物以及少量的2-(吲哚-3-基)-3H-吲哚-3 -肟; 当相同的吲哚与亚硝酸反应时获得的主要产物为2-(吲哚-3-基)-3H-吲哚-3-肟。3-烷基取代的吲哚与二氧化氮的反应相当复杂,并导致形成不同的硝基吲哚,而当使用亚硝酸时观察到亚硝化。