We report a palladium-catalysed ethylene Heck reaction for the vinylation of aryl iodides using a tube-in-tube gas-liquid reactor. The flow process afforded various styrenes in short reaction times, employing moderate ethylene pressure.
Palladium‐Catalyzed Selective Reduction of Carbonyl Compounds
作者:Nabin Sarkar、Mamata Mahato、Sharanappa Nembenna
DOI:10.1002/ejic.202000310
日期:2020.6.23
the formation of complexes 1 (Yield 73 %) and 2 (Yield 52 %), respectively. Moreover, these complexes were characterized thoroughly by several spectroscopic techniques (1H, 13C NMR, UV/Vis, FT‐IR, and HRMS), including single‐crystal X‐ray structural and elemental analyses. In addition, we tested the catalytic activity of these complexes 1 –2 for the hydroboration of carbonyl compounds with pinacolborane
1-Methyl-1-vinyl- and 1-Methyl-1-(prop-2-enyl)silacyclobutane: Reagents for Palladium-Catalyzed Cross-Coupling Reactions of Aryl Halides
作者:Scott E. Denmark、Zhigang Wang
DOI:10.1055/s-2000-6292
日期:——
1-Methyl-1-vinylsilacyclobutane (1) and 1-methyl-1-(prop-2-enyl)silacyclobutane (2) undergo rapid and high yielding cross-coupling with aromatic halides. Many different substituents and patterns on the aromatic moiety are tolerated. All reactions can be run at room temperature and require the presence of tetrabutylammonium fluoride and Pd(dba)2. Both silacyclobutanes can be made in one step from commercially available precursors.
The present invention relates to non-steroidal progesterone receptor modulators of the general formula 1,
the use of the progesterone receptor modulators for the manufacture of medicaments, and pharmaceutical compositions which comprise these compounds.
The compounds according to the invention are suitable for the therapy and prophylaxis of gynaecological disorders such as endometriosis, leiomyomas of the uterus, dysfunctional bleeding and dysmenorrhoea, and for the therapy and prophylaxis of hormone-dependent tumours and for use for female fertility control and for hormone replacement therapy.
Selective silver: A core–shell AgNP–CeO2 nanocomposite (AgNP@CeO2) acted as an effective catalyst for the chemoselectivereductions of unsaturated aldehydes to unsaturated alcohols with H2 (see figure). Maximizing the AgNP–CeO2 interaction successfully induced the heterolytic cleavage of H2, resulting in highly chemoselectivereductions. Furthermore, a highly dispersed AgNP@CeO2 system was also developed
选择性银:核-壳型AgNP-CeO 2纳米复合材料(AgNP @ CeO 2)是有效的催化剂,可将H 2的不饱和醛化学选择性还原为不饱和醇(见图)。最大程度地提高AgNP–CeO 2的相互作用可以成功诱导H 2的异源裂解,从而导致高度化学选择性的降低。此外,还开发了高度分散的AgNP @ CeO 2系统,该系统显示出比原始AgNP @ CeO 2高的活性。