- Synthesis and structural characterization of Rh(III) complexes containing diamino ligands of types {D(C6H4NH2)2} and {D(C6H4CH2NHEt)2} (D?=?O, S) bearing different spacers
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The reaction of the diamino ligands of general formula {D(C6H4NH2)2} [D?=?O (L1); S (L2)] and {D(C6H4CH2NHEt)2} [D?=?O (L3); S (L4)] with RhCl3·3H2O yielded neutral coordination complexes [RhIII(Ln)Cl3] [n?=?1 (1); n?=?2 (2); n?=?3 (4); n?=?4 (5)]. Compound 1 in N,N-dimethylformamide solution promoted the formation of the neutral complex [RhIII(L1)(dmf)Cl3] (3). A zwitterionic complex [RhIII(HL4)Cl4] (6) was obtained from the reaction of L4with RhCl3·3H2O as a minor compound. All complexes were characterized in solution by NMR and by vibrational spectroscopy in solid state. Crystal structures of the chlorohydrates [H2L3]Cl2·H2O, [H2L4]Cl2, and the complexes 2–6 were identified by X-ray diffraction studies. Molecular structures of the complexes revealed different coordination patterns of the diamino ligands Lnas well as the formation of chelate rings of five-, six-, and eight members. The presence of N–H groups in the title compounds enhanced the formation of hydrogen bond networks that were analyzed on the basis of a graph set analysis approach, displaying rings at the first to third level.
- Alvarado-Rodríguez, José G.,Hernández-Balderas, Uvaldo,Andrade-López, Noemí,Salazar, Verónica,Sánchez-Cabrera, Gloria,Zuno-Cruz, Francisco J.
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- N-Heterocyclic carbene (NHC)-catalyzed intramolecular benzoin condensation-oxidation
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NHC-Catalyzed intramolecular benzoin condensation-oxidation is developed for the expedient synthesis of diverse cyclic 1,2-diketones incorporated in dibenzo-fused seven-membered heterocycles in good to excellent yields, under ambient conditions. The prese
- Satyam, Killari,Ramarao, Jakkula,Suresh, Surisetti
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supporting information
p. 1488 - 1492
(2021/03/01)
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- Imidazole compound and applications thereof
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The invention discloses a compound represented by a general formula (1), wherein Z is S or O, X-X are respectively and independently selected from CR and N, X and X can be connected by a single bond or not, R and R are respectively and independently selected from one of hydrogen, C1-C12 alkyl, C6-C30 aryl and C3-C30 heteroaryl, R is selected from hydrogen, C1-C12 alkyl, C6-C30 aryl and C3-C30 heteroaryl, L and L are respectively and independently selected from one of a single bond, C6-C30 aryl and C3-C30 heteroaryl, Ar is selected from substituted or unsubstituted imidazole groups, and Ar is selected from one of C6-C30 aryl and C3-C30 heteroaryl. When the compound is used as a luminescent material in an OLED device or an electron transport material, the compound shows excellent device performance and stability. The invention also discloses an organic light-emitting device adopting the compound represented by the general formula.
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Paragraph 0053-0056
(2020/03/25)
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- N-substituted nitrogen-containing heterocyclic derivative, preparation method and applications thereof
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The invention relates to an N-substituted nitrogen-containing heterocyclic derivative, a preparation method and applications thereof. Compared with the method in prior art, the method of the present invention has the following characteristics that a series of N-substituted pyrrole or indole derivatives with novel structure and significant anticancer activity are synthesized by using a simple and effective method. According to the present invention, the MTT test results show that the derivative can significantly inhibit the proliferation activity of liver cancer cell line HepG2, lung cancer cell line A549 and other cancer cells; the N-substituted pyrrole or indole derivative containing 9,10-dihydrophenanthrene, 10,11-dihydrodibenzo[b,f]oxepin and 10,11-dihydrodibenzo[b,f]thiepin can be prepared through the one-pot reaction of dialdehyde and 4-hydroxy-L-proline or indoline-2-formic acid; and the preparation method is convenient, rapid and efficient.
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Paragraph 0065-0067
(2019/11/20)
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- A novel and efficient method for the direct synthesis of pyrrolyl or indolyl substituted 9,10-dihydrophenanthren-9-ol analogues
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A novel domino intramolecular [3+2] cycloaddtion and ring-opening aromatization process has been successfully developed for the efficient direct synthesis of pyrrolyl or indolyl substituted 9,10-dihydrophenanthren-9-ol analogues. And 1-(phenanthren-9-yl)-
- Song, Gonghua,Wang, Jiayi,Xia, Qi,Zhang, Juan,Zhao, Xinlei
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supporting information
(2019/12/24)
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- Gold(I) Complexes Stabilized by Nine- and Ten-Membered N-Heterocyclic Carbene Ligands
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Nine- and ten-membered N-heterocyclic carbene (NHC) ligands have been developed and for the first time their gold(I) complexes were synthesized. The protonated NHC pro-ligands 2 a–h were prepared by the reaction of readily available N,N′-diarylformamidines with bis-electrophilic building blocks, followed by anion exchange. In situ deprotonation of the tetrafluoroborates 2 a–h with tBuOK in the presence of AuCl(SMe2) provided fast access to NHC-gold(I) complexes 3–10. These new NHC-gold(I) complexes show very good catalytic activity in a cycloisomerization reaction (0.1 mol % catalyst loading, up to 100 % conversion) and their solid-state structures reveal high steric hindrance around the metal atom (%Vbur up to 53.0) which is caused by their expanded-ring architecture.
- Cervantes-Reyes, Alejandro,Rominger, Frank,Rudolph, Matthias,Hashmi, A. Stephen K.
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supporting information
p. 11745 - 11757
(2019/08/20)
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- New short strategy for the snthesis of the dibenz[b,f]oxepins scaffold
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In this report a short and efficient synthesis of the dibenz[b,f]oxepin framework through intramolecular SNAr and McMurry reactions is described. The diaryl ethers required for the McMurry reaction have been obtained in good yields under microwave-assisted conditions of the reaction of salicylaldehydes with fluorobenzaldehydes without catalysts. Application of an intramolecular McMurry reaction to the synthesized diarylethers using TiCl4/Zn in THF gave the target dibenzo[b,f]oxepin system in 53%-55% yields.
- Moreno, David R.R.,Giorgi, Giorgio,Salas, Cristian O.,Tapia, Ricardo A.
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p. 14797 - 14806
(2014/01/17)
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- Rhodium(II)-catalyzed cyclization of bis(N-tosylhydrazone)s: An efficient approach towards polycyclic aromatic compounds
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Ahead of the PAC: Polycyclic aromatic compounds (PACs) can be easily accessed by the combination of Suzuki-Miyaura cross-coupling and a [Rh 2(OAc)4]-catalyzed carbene reaction using easily available bis(N-tosylhydrazone)s as intermediates (see scheme; Ts=4-toluenesulfonyl). Copyright
- Xia, Ying,Liu, Zhenxing,Xiao, Qing,Qu, Peiyuan,Ge, Rui,Zhang, Yan,Wang, Jianbo
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supporting information; experimental part
p. 5714 - 5717
(2012/07/28)
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- Synthesis of Strapped, Dimeric, and Trimeric Porphyrins Based on Intramolecular Macrocyclization Reactions
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Strapped porphyrins were prepared directly by the acid-catalyzed condensation reaction of 3,3'-diethyl-4,4'-dimethyl-2,2'-dipyrrylmethane and methylenedioxy bridged dialdehydes having a strap linkage longer than 7 atoms.Dimeric and trimeric porphyrins wit
- Osuka, Atsuhiro,Kobayashi, Fumikazu,Maruyama, Kazuhiro
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p. 1213 - 1225
(2007/10/02)
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