Synthesis, structure, and antitumor activity of 2,9-disubstituted perhydro 2,3a,7b,9,10a,14b-hexaazadibenzotetracenes
作者:Elena B. Rakhimova、Victor Yu. Kirsanov、Elena V. Tret'yakova、Leonard M. Khalilov、Askhat G. Ibragimov、Lilya U. Dzhemileva、Vladimir A. D'yakonov、Usein M. Dzhemilev
DOI:10.1039/d0ra03209c
日期:——
Catalytic methods for the synthesis of previously unknown 2,9-disubstituted 3bR*,7aR*,10bR*,14aR*-cis-14c,14d-perhydro-2,3a,7b,9,10a,14b-hexaazadibenzotetracenes with pronounced antitumor activity have been developed.
One-pot catalytic synthesis of 2,7- bis -substituted 4,9(10)-dimethyl-2,3a,5a,7,8a,10a-hexaazaperhydropyrenes
作者:Elena B. Rakhimova、Victor Yu. Kirsanov、Ekaterina S. Meshcheryakova、Leonard M. Khalilov、Boris I. Kutepov、Askhat G. Ibragimov、Usein M. Dzhemilev
DOI:10.1016/j.tet.2017.10.048
日期:2017.12
7-bis-substituted 4,9(10)-dimethyl-2,3a,5a,7,8a,10a-hexaazaperhydropyrenes have been developed. The structure was established on the basis of 1H and 13C NMR spectra, 2D NMR (HSQC, HMBC, COSY, NOESY) techniques, MALDI TOF/TOF spectra, and X-raydiffractiondata. Primary screening of the synthesized hexaazaperhydropyrenes for antimicrobial activity was performed.
已经开发了用于合成2,7-双取代的4,9(10)-二甲基-2,3a,5a,7,8a,10a-六氮杂过氢吡啶的催化方法。该结构是基于1 H和13 C NMR光谱,2D NMR(HSQC,HMBC,COSY,NOESY)技术,MALDI TOF / TOF光谱和X射线衍射数据确定的。初步筛选了合成的六氮杂氢吡啶类化合物的抗菌活性。
An efficient catalytic method for the synthesis of 2,7-dialkyl-2,3a,5a,7,8a,10a-hexaazaperhydropyrenes
作者:Elena B. Rakhimova、Rinat A. Ismagilov、Ekaterina S. Meshcheryakova、Leonard M. Khalilov、Askhat G. Ibragimov、Usein M. Dzhemilev
DOI:10.1016/j.tetlet.2014.09.122
日期:2014.11
An efficient method for the synthesis of 2,7-dialky1-2,3a,5a,7,8a,10a-hexaazaperhydropyrenes in high yields (up to 95%) via the intermolecular cyclization of 1,4,5,8-tetraazadecalin with N,N-bis(methoxy-methyl)-N-alkylamines in the presence of SmCI3 center dot 6H(2)O as the catalyst has been developed. (C) 2014 Elsevier Ltd. All rights reserved.
PHOSPHORUS NITROGEN FLAME RETARDANT, METHOD THEREOF AND MATERIAL COMPRISING THE SAME
申请人:ZHOU Chongfu
公开号:US20220127533A1
公开(公告)日:2022-04-28
Provided are phosphorus nitrogen flame retardants represented by Formula III, a method of preparing the flame retardants without using any solvent, and various materials comprising the flame retardants. Rb and Rc are independently of each other selected from hydrogen, substituted or unsubstituted alkyl such as C1-C18 alkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocyclic alkyl, substituted or unsubstituted heterocycles, substituted or unsubstituted aryl such as C6˜C18 aryl, substituted or unsubstituted heteroaryl such as C3˜C18 heteroaryl, and acyl radical. The invention exhibits numerous technical merits such as excellent flame retardant efficacy, good compatibility with polymers, lower migration to material surface, excellent hydrolysis resistance, low smoke and low toxicity during burning, simpler preparation process, fewer by-products, shorter reaction time, higher yield, and no environmental impact, among others.
Transition metal-catalyzed C,C- and C,N-cycloaminomethylation reactions of pyrrole and indole
作者:Vnira R. Akhmetova、El’mira M. Bikbulatova、Nail S. Akhmadiev、Nailya F. Galimzyanova、Raikhana V. Kunakova、Askhat G. Ibragimov
DOI:10.1007/s10593-018-2299-6
日期:2018.5
es or a mixture of alkyl(phenyl)amines and paraformaldehyde in the presence of [Ni(Py)4Cl2]·0.76H2O or NiCl2·6H2O catalysts proceeded at positions 2 and 5 of pyrrole ring. Cycloaminomethylation of indole was accomplished effectively at positions 1 and 3 in the presence of ZrOCl2·8H2O catalyst. When carbazole was treated with bis(methoxymethyl)alkylamine in the presence of ZrOCl2·8H2O catalyst, it was