Described here is the denovo design and synthesis of a series of 6H-dipyrido[1,2-e:2′,1′-i]purin-6-ones (DPs) as a new class of visible-light photoredox catalysts (PCs). The synthesized DP1–5 showed their λAbs(max) values in 433–477 nm, excited state redox potentials in 1.15–0.69 eV and −1.41 to −1.77 eV (vs. SCE), respectively. As a representative, DP4 enables the productive guanylation of various
本文描述了一系列 6 H-联吡啶并[1,2- e :2',1'- i ]purin-6-ones (DPs) 作为新型可见光光氧化还原催化剂的从头设计和合成(件)。合成的DP1-5的λ Abs(max)值分别在 433-477 nm,激发态氧化还原电位分别在 1.15-0.69 eV 和 -1.41 到 -1.77 eV(相对于SCE)。作为代表,DP4能够对各种胺进行有效的鸟苷化,包括 1°、2° 和 3°-烷基伯胺、仲胺、芳基和杂芳基胺、氨基腈、氨基酸和肽以及丙炔胺和 α-氨基酯,从而产生多样性在生物学上重要的胍和环状胍中。DP4在鸟苷酸化反应中的光催化功效超过了常用的 Ir 和 Ru 多吡啶基配合物,以及一些有机 PC。该方法的其他显着优点包括广泛的底物范围和官能团耐受性、克级合成和通用的后期衍生化,导致衍生物81对具有 IC 50的拉莫斯细胞表现出 60 倍更好的抗癌活性 比临床药物依鲁替尼
Kresze, Guenter; Hatjiissaak, Anastassios, Phosphorus and Sulfur and the Related Elements, 1987, vol. 29, p. 41 - 48
作者:Kresze, Guenter、Hatjiissaak, Anastassios
DOI:——
日期:——
An expedient synthesis of substituted guanidines
作者:Krishnamurthy Ramadas、Natarajan Srinivasan
DOI:10.1016/0040-4039(95)00360-o
日期:1995.4
This work discusses a rapid synthesis of substituted guanidines from 1,3-disubstituted thloureas using copper sulphate-silica gel in the presence of an amine. The method surpasses the previous known methods for the synthesis.
Synthesis, Characterization, and O<sub>2</sub> Reactivity of Iridium(I) Complexes Supported by Guanidinato Ligands
作者:Jan-Uwe Rohde、Matthew R. Kelley、Wei-Tsung Lee
DOI:10.1021/ic801867r
日期:2008.12.15
Mononuclear [IrArNC(NR(2))NAr}(C(8)H(12))] complexes (where R = Me or Et; Ar = Ph, 4-MeC(6)H(4), or 2,6-Me(2)C(6)H(3); and C(8)H(12) = 1,5-cyclooctadiene) were synthesized from the neutral N,N-dialkyl-N',N ''-diarylguanidines via deprotonation and trans metalation. As confirmed by single-crystal structure determinations, the guanidinato(1-) ligands coordinate the low-valent d(8) Ir(I) center in an N,N'-chelating binding mode, and the (13)C NMR chemical shifts of the alkene carbon atoms establish that these ligands function as stronger donors than related monoanionic, bidentate nitrogen-based ligands. In the reactions of the complexes with O(2), the observed reactivity trends correlate with the electronic and steric influences of the substituents of the guanidinato ligands.