Reduction of CO<sub>2</sub> into Methylene Coupled with the Formation of C–S Bonds under NaBH<sub>4</sub>/I<sub>2</sub> System
作者:Zhiqiang Guo、Bo Zhang、Xuehong Wei、Chanjuan Xi
DOI:10.1021/acs.orglett.8b02730
日期:2018.11.2
four-electron reduction of CO2 with thiophenol using NaBH4 as a reductant is described to access dithioacetals. This reaction provides a novel synthetic method for the highly selective conversion of CO2 into methylene, and a new access to molecular structures via formation of C–Sbonds using CO2 as the C1 source.
Regioselective transition metal- and halogen-free direct dithiolation at C(sp<sup>3</sup>)–H of nitrotoluenes with diaryl disulfides
作者:Shailesh Kumar、Rahul Kadu、Sangit Kumar
DOI:10.1039/c6ob01856d
日期:——
tert-butoxide-mediated regioselective direct C–S bond formation at the C(sp3)–H position of nitrotoluenes with disulfides in DMSO at room temperature. The developed reaction generated, in good yields, various dithioacetals having OMe, halogen, and NH2 functionalities at various positions of the arene rings of the disulfides. Interestingly, in the absence of nitrotoluene, diaryldisulfides and diselenides underwent one-carbon
2-(Aryl-sulfonyl)oxetanes as designer 3-dimensional fragments for fragment screening: synthesis and strategies for functionalisation
作者:Kate F. Morgan、Ian A. Hollingsworth、James A. Bull
DOI:10.1039/c3cc46450d
日期:——
2-Sulfonyl-oxetanes have been prepared, affording non-planar structures with desirable physicochemical properties for fragment based drug discovery. The oxetane motif was formed by an intramolecular C–C bond formation. The fragments were further functionalised via organometallic intermediates at the intact oxetane and aromatic rings.
Studies on the synthesis, stability and conformation of 2-sulfonyl-oxetane fragments
作者:K. F. Morgan、I. A. Hollingsworth、J. A. Bull
DOI:10.1039/c5ob00549c
日期:——
halogenated derivatives. With a number of oxetane containing fragment compounds available, their pH stability was assessed, indicating good half-life values for mono-substituted aryl sulfonyl oxetanes across the pH range (1 to 10). Solubility and metabolic stability data is also reported. Finally, the conformation of the fragments is assessed computationally, providing an indication of possible binding orientations
(dpds) enables a series of different copper complexes to be isolated in good yield, including [CuCl2(μ-dpds)] (1) which has a one-dimensional helical structure and [Cu(μ-Cl)(μ-dpds)] (4) which has a two-dimensional sheet structure. Flexible movement of the disulfide group in the dpds ligand facilitates the formation of complexes with a diverse range of structures. Compound 1 transforms into 4 almost