substitution of an alkoxy groups (SNipso) by amino group were isolated in good yields. The reactions proceed in anhydrous dimethyl sulfoxide solution at room temperature. But when anions of the mono‐substituted ureas containing bulky substituents were used, the first products of the earlier unknown SNAr reactions of alkyl carbamoyl amination were obtained.
研究了尿素阴离子作为亲核试剂与1,3,7-三氮杂py烯烷氧基衍生物反应的能力。发现出乎所有人的意料,以良好的产率分离了烷氧基(S N ipso)被氨基取代的产物。反应在室温下在无水二甲基亚砜溶液中进行。但是,当使用含有大取代基的单取代脲的阴离子时,就得到了烷基氨基甲酰基氨基化的更早未知的S N Ar反应的第一产物。
An oxidative alkylamination of 1,3,7-triazapyrenes in the aqueous medium
1,3,7‐Triazapyrene and 2‐methyl‐1,3,7‐triazapyrene have shown to react with a wide range of alkylamines in the presence of an oxidant (K3Fe(CN)6) in the water solution at room temperature to give rise to the corresponding 6‐mono‐alkyl(dialkyl)amino‐ and 6,8‐bis‐dialkylamino derivatives. J. Heterocyclic Chem., (2011).
Synthesis and cleavage of 1,3,7-triazapyrene ethers
作者:O. P. Demidov、I. V. Borovlev、N. A. Saigakova、O. A. Nemykina、S. V. Pisarenko
DOI:10.1007/s10593-013-1168-6
日期:2013.1
Oxidative alkoxylation of 1,3,7-triazapyrenes in the system ROH-H2O-KOH-K3Fe(CN)(6) leads via a tandem S (N) (H)-S (N) (H) process to the formation of 6,8-dialkoxy-1,3,7-triazapyrenes. Hydrolytic cleavage of these ethers leads to products of single or double dealkylation, depending on the reaction conditions.
Acid catalysis in the oxidative nucleophilic alkoxylation of 1,3,7-triazapyrenes
作者:I. V. Borovlev、O. P. Demidov、N. A. Saigakova
DOI:10.1007/s11172-011-0268-7
日期:2011.8
A new method for [c,d]pyridine peri-annelation: synthesis of azapyrenes from phenalenes and their dihydro derivatives
作者:Alexander V. Aksenov、Ivan V. Borovlev、Inna V. Aksenova、Sergey V. Pisarenko、Dmitry A. Kovalev
DOI:10.1016/j.tetlet.2007.11.132
日期:2008.1
An effective synthesis of various azapyrenes from phenalenes and their dihydroderivatives has been developed using 1,3,5-triazines in polyphosphoric acid (PPA).