Synthesis, rearrangements, and fragmentation of ketene mercaptals derived from ketones or β-diketones and carbon disulphide
作者:L. Dalgaard、L. Jensen、S.-O. Lawesson
DOI:10.1016/s0040-4020(01)97222-9
日期:1974.1
By use of the ion pair extraction technique, tetrabutylammonium salts of acetylacetone, benzoylacetone, and dibenzoylmethane were reacted with carbon disulphide to give salts of dithioacids. Alkylation gave dithioesters and ketene mercaptals. A simple procedure for the preparation of 2-diacylmethylene-1,3-dithietanes was found. Cyclisation reactions of some acetylacetone derivatives gave a 1,3-dithiolane
Tuning Cyclometalated Gold(III) for Cysteine Arylation and Ligand-Directed Bioconjugation
作者:Sailajah Gukathasan、Sean Parkin、Esther P. Black、Samuel G. Awuah
DOI:10.1021/acs.inorgchem.1c01517
日期:2021.10.4
challenges in chemical biology. Unique bioorthogonal chemistry can be achieved with preformed metal-based compounds; however, their utility in native protein sites within cells remain underdeveloped. Here, we tune the ancillary ligands of cyclometalated gold(III) as a reactive group, and the gold scaffold allows for rapid modification of a desired cysteine residue proximal to the ligand binding site of a target
Electrochemistry of lanthanoid(III) complexes in dimethyl sulfoxide in the presence of n-Bu4N(acac) and n-Bu4N(dibm)
作者:Akio Iwase、Yoshinori Araki、Reiko Takahashi
DOI:10.1016/0013-4686(90)87070-i
日期:1990.11
lanthanoid Ln(III) complexes was investigated in Me2SO including n-Bu4N(acac) and n-Bu4N(dibm) as ligands (where acac is the acetylacetonate anion and dibm is the diisobutrylmethanate anion). Reversible one electron reduction waves corresponding to Ln(III) complexes→Ln(II) complexes were observed in the concentration range of 5–20 mM of the ligands, including 1 mM lanthanoid perchlorates and 0.1 M TEAP
镧系LN(III)络合物的电化学行为在我研究了2 SO包括Ñ -Bu 4 N(ACAC)和Ñ -Bu 4 N(dibm)作为配体(其中ACAC是乙酰丙酮化物阴离子和dibm是diisobutrylmethanate阴离子) 。在5–20 mM的配体浓度范围内观察到了对应于Ln(III)配合物→Ln(II)配合物的可逆的一个电子还原波,包括1 mM镧系高氯酸盐和0.1 M TEAP。在存在5 mM配体的情况下,在0.1 M TEAP中,镧系元素络合物的半波电势为sce -1.66至-2.61 V ,具体取决于镧系元素(III)离子。
Direct intramolecular carbon(sp<sup>2</sup>)–nitrogen(sp<sup>2</sup>) reductive elimination from gold(<scp>iii</scp>)
作者:Jong Hyun Kim、R. Tyler Mertens、Amal Agarwal、Sean Parkin、Gilles Berger、Samuel G. Awuah
DOI:10.1039/c8dt05155k
日期:——
carbon donor ligands results in reductiveelimination. Combined experimental and computational investigations lead to the first evidence of a direct intramolecular C(sp2)–N(sp2) bond formation from a monomeric [(C^N)AuCl2] gold(III) complex. We show that bidentate ligated Au(III) systems bypass transmetallation to form C(sp2)–N(sp2) species and NHC–Au–Cl. Mechanistic investigations of the reported transformation
Exploiting complementary ligands for the construction of square antiprismatic monometallic lanthanide SMMs
作者:Yushu Jiao、Sidra Sarwar、Sergio Sanz、Jan van Leusen、Natalya V. Izarova、Cameron L. Campbell、Euan K. Brechin、Scott J. Dalgarno、Paul Kögerler
DOI:10.1039/d1dt00359c
日期:——
The methylation of p-tert-butylcalix[4]arene in the distal 1,3-phenolic sites provides the ligand H2L = p-tert-butylcalix[4](OMe)2(OH)2arene} that enables construction of heteroleptic mononuclear lanthanide complexes. The reaction of (N(nBu)4)(acac) (Hacac = acetylacetone), MIIICl3 and H2L under Schlenk conditions results in the formation of a family of (N(nBu)4)[MIIIL(acac)2] complexes where M =
对叔丁基杯[4]芳烃在远端 1,3-酚位点的甲基化提供了配体 H 2 L = 对叔丁基杯[4](OMe) 2 (OH) 2芳烃},使构建成为可能杂配单核镧系元素配合物。(N( n Bu) 4 )(acac) (Hacac = 乙酰丙酮)、M III Cl 3和 H 2 L 在 Schlenk 条件下的反应导致形成 (N( n Bu) 4 )[M III家族L(acac) 2 ] 复合物,其中 M = Y ( 1 ), Gd ( 2 ), Tb (3 ) 和 Dy ( 4 )。金属离子在扭曲的方形反棱柱配位几何中是八配位的,导致 Tb 衍生物的磁化缓慢弛豫。