N-Substitution dependent stereoselectivity switch in palladium catalyzed hydroalkynylation of ynamides: a regio and stereoselective synthesis of ynenamides
pyrazolyl azides (6a-h), and pyrazolyltriazoles (8a-h, 10a-p and 12a-l) were prepared and evaluated for their bioactivity (anti-bacterial and anti-inflammatory) profile. The compound 5c displayed the potent anti-bacterialactivity against Micrococcus luteus (MIC 3.9 and MBC 7.81 µg/mL). In vitro anti-inflammatory activity data denoted that compound 8b is effective among the tested compounds against IL-6 (IC50
dTolmp-supported PtCu2 complexes are boosted to 6.6 and 11.6 times as high as those of the dpmp-supported ones in CH2Cl2 solutions and the solid state, respectively. From dpmp to dTolmp, introducing sterically hindered 2-methyl groups to phenyl rings not only improves the π-conjugation character of PtCu2 complexes, but also effectively inhibits the deactivation process of the triplet excited state through
Use of 1,1-dichloro-2,2-difluoroethylene in synthesis of fluorine-containing aryl acetylene
作者:K. Okuhara、K. Kodaira
DOI:10.1016/s0022-1139(00)85570-0
日期:1983.11
Recently polyfluoroacetylene and polydifluoroacetylene have been proposed as possible semiconducting meterials, particularly after doped with electron donors. Since their monomers are difficult to handle and their polymerization is unknown, polyphenylacetylene having fluorine atoms may be of considerable interest in evaluating the role of fluorine in this area. In connection with such a project, synthesis
Stereodivergent Synthesis of (<i>Z</i>)-/(<i>E</i>)-β-Sulfonylacrylamides via Tandem Difunctionalization of Alkynes with Sulfinates and Isocyanides
作者:Shashank Tripathi、Monty Kumar、Mayur D. Ambule、Ankit Saxena、Ruchir Kant、Sanjeev K. Shukla、Ajay Kumar Srivastava
DOI:10.1021/acs.orglett.2c03092
日期:2022.10.21
prepare (Z)-/(E)-β-sulfonylacrylamides. The (Z)-β-sulfonylacrylamides were generated via a one-pot process that involves the reaction of terminal alkynes with sulfinates and isocyanides in the presence of iodine in sequential manner. The (E)-β-sulfonylacrylamides were prepared in a two-step synthesis via palladium(II)-catalyzed addition of isocyanide to (E)-β-iodovinylsulfones synthesized from alkynes.
已实现末端和内部炔烃与各种亚磺酸盐和异氰化物的立体选择性双官能化,以制备 ( Z )-/( E )-β-磺酰基丙烯酰胺。( Z )-β-磺酰基丙烯酰胺是通过一锅法生成的,该过程涉及末端炔烃与亚磺酸盐和异氰化物在碘存在下以顺序方式反应。( E )-β-磺酰基丙烯酰胺是通过钯 (II) 催化的异氰化物加成到由炔烃合成的 ( E )-β-碘代乙烯基砜的两步合成制备的。
Spectroscopic and Phosphorescent Modulation in Triphosphine-Supported PtAg<sub>2</sub>Heterotrinuclear Alkynyl Complexes
A series of highly phosphorescent PtAg2 heterotrinuclear alkynyl complexes with bis(diphenylphosphinomethyl)-phenylphosphine (dpmp) were prepared and characterized structurally. The solution phosphorescence with various emitting colors is systematically modulated by modifying substituents as well as pi-conjugated systems in aromatic acetylides. The crystals, powders, or films exhibit reversible stimuli-responsive phosphorescence changes upon exposure to vapor of MeCN, pyridine, DMF, etc., resulting from perturbation of d(8)-d(10) metallophilic interaction in the excited states as a consequence of the formation/disruption of Ag-solvent bonds. Both experimental and time-dependent density functional theory (TD-DFT) studies demonstrate that d(8)-d(10) metallophilic interaction exerts a crucial role on phosphorescent characteristics due to the PtAg2 cluster-based (3)[d -> p] state. This study affords a paradigm for phosphorescence modulation in d(8)-d(10) heteronuclear complexes.