445479-92-5Relevant articles and documents
DNA-cleavage activity of the iron(II) complex with optically active ligands, meta- and para-xylyl-linked N’,N’-dipyridylmethyl-cyclohexane-1,2-diamine
Fujita, Mikako,Ichimaru, Yoshimi,Imai, Masanori,Jin, Wanchun,Kato, Koichi,Kurosaki, Hiromasa,Okuno, Yoshinori,Otsuka, Masami,Yamaguchi, Yoshihiro
, (2021/02/12)
DNA-cleavage agents such as bleomycin have potential anticancer applications. The development of a DNA-cleavage reagent that recognizes specific sequences allows the development of cancer therapy with reduced side effects. In this study, to develop novel compounds with specific DNA-cleavage activities, we synthesized optically active binuclear ligands, (1R,1′R,2R,2′R)-N1,N1′-(meta/para-phenylenebis(methylene))bis(N2,N2-bis(pyridin-2-ylmethyl)cyclohexane-1,2-diamine) and their enantiomers. The DNA-cleavage activities of these compounds were investigated in the presence of Fe(II)SO4 and sodium ascorbate. The obtained results indicated that the Fe(II) complexes of those compounds efficiently cleave DNA and that their cleavage was subtle sequence-selective. Therefore, we succeeded in developing compounds that can be used as small-molecule drugs for cancer chemotherapy.
Carbamate-based P,O-ligands for asymmetric allylic alkylations
Pálv?lgyi, ádám Márk,Schnürch, Michael,Bica-Schr?der, Katharina
supporting information, (2020/05/18)
Herein we report the design and successful catalytic application of modified Trost-ligands in asymmetric allylic alkylation (AAA) reactions. A small set of carbamate-monophosphine P,O-ligands has been prepared in a straightforward two-step synthetic procedure. After optimization of the reaction conditions, high catalytic activities and excellent enantioselectivity up to >99% have been attained.
Chiral primary amine tagged to ionic group as reusable organocatalyst for asymmetric Michael reactions of C-nucleophiles with α,β-unsaturated ketones
Kucherenko, Alexander S.,Siyutkin, Dmitry E.,Nigmatov, Albert G.,Chizhov, Alexander O.,Zlotin, Sergei G.
supporting information, p. 3078 - 3086 (2013/01/15)
The first primary amine-derived organocatalyst modified with an ionic group for asymmetric Michael reactions of C-nucleophiles with α,β- unsaturated ketones was synthesized. In the presence of this catalyst and an acidic co-catalyst (AcOH), hydroxycoumarin and its sulfur-containing analogue reacted with benzylideneacetone derivatives or cyclohexenone to afford the corresponding Michael adducts in high yields (up to 97%) and with reasonable enantioselectivity (up to 80%). The catalyst could be easily recovered and efficiently reused three times, afterwards, its activity and stereodifferentiating ability gradually declined. The analysis of recovered catalyst samples by ESI-MS allowed us to detect undesirable side reactions that poisoned the catalyst, and propose an approach for its reactivation. Copyright