Ketones derived from unsubstituted 2,3-dihydroperimidine were obtained by the selective reduction of the corresponding acylperimidines. The direct acylation of 2,3-dihydroperimidine in PPA is accompanied by dehydrogenation and leads to 4(9)-acylperimidines. The spectral characteristics of these products were discussed.
Synthesis and special features of the structure of 6(7)-aminoperimidine derivatives
作者:A. V. Aksenov、A. S. Lyakhovnenko、N. C. Karaivanov、I. I. Levina
DOI:10.1007/s10593-010-0532-z
日期:2010.8
of perimidines with sodium azide in PPA. The corresponding amides were synthesized by acylation and were also obtained by the Schmidt reaction from 6(7)-acetyl(or benzoyl)perimidines. A special feature of the structure of the 2-substituted amines and amides is the presence of annular tautomerism slow in NMR time.
Novel approach to the synthesis of 1,3-diazapyrenes
作者:A. V. Aksenov、I. V. Borovlev、I. V. Aksenova、D. A. Lobach、A. S. Lyakhovnenko
DOI:10.1007/s10593-009-0227-5
日期:2009.1
Methods have been developed for the synthesis of 1,3-diazapyrenes based on the reactions of perimidines with ethoxymethylene-1,3-dicarbonyl compounds and also 6(7)-benzoyl(acetyl, formyl)perimidines with carbonyl compounds in PPA.
6(7)-Acylperimidines nitration and methods of peri-annelation on this base
作者:A. V. Aksenov、N. A. Aksenov、A. S. Lyakhovnenko、A. N. Smirnov、I. I. Levina、I. V. Aksenova
DOI:10.1007/s10593-013-1335-9
日期:2013.10
A method has been developed for the nitration of 6(7)-acylperimidines using sodium nitrite in formic acid. The reaction gives a mixture of 4(9)-, 9(4)-, and 7(6)-nitro-6(7)-acylperimidines from which the latter can be separated by extraction with chloroform. Reduction of the 6(7)-acyl-7(6)-nitro- perimidines yields 1H-1,5,7-triazacyclopenta[cd]phenalenes. Subsequent Schmidt reaction and reduction give 1,3,6,8-tetraazapyrenes.
Reaction of 6(7)-acyl-and 6(7)-formylperimidines with 1,3,5-triazines in poly-phosphoric acid
作者:A. V. Aksenov、I. V. Borovlev、S. V. Pisarenko、I. V. Aksenova
DOI:10.1007/s10593-008-0121-6
日期:2008.7
A method has been developed for the synthesis of 1,3,7-triazapyrenes using the reaction of 6(7)-formyl- and 6(7)-benzoylperimidines with 1,3,5-triazines in PPA. Under these conditions, 6(7)-formylperimidine reacts with 2,4,6-trimethyl-1,3,5-triazine to give 6-hydroxy-1,3-diazapyrene.
A new method for pyrrole peri-annulation: synthesis of 1H-1,5,7-triazacyclopenta[c,d]phenalenes from 1H-perimidines
作者:Alexander V. Aksenov、Alexander S. Lyakhovnenko、Anna V. Andrienko、Irina I. Levina
DOI:10.1016/j.tetlet.2010.02.129
日期:2010.5
New methods for the synthesis of 1H-1,5,7-triazacyclopenta[c,d]phenalenes have been developed based on a sequence involving Schmidt reaction of keto-perimidines and acylation of the intermediate amides with 1,3,5-triazines or carboxylic acids. The same synthetic sequence starting from the corresponding alkylperimidine includes acylation with acetic acid as the first step. (C) 2010 Elsevier Ltd. All rights reserved.