Pd Deposition onto the Thermally Roughened Cu(110) Surface
摘要:
We study the deposition of Pd onto two morphologically distinct Cu(110) surfaces: the first being the surface prepared by conventional ion bombardment and anneal cycles and the second being the thermally roughened surface consisting of a well-defined surface morphology of large terraces terminated by exclusively monoatomic height steps. We use the optical technique of reflection anisotropy spectroscopy in combination with scanning tunnelling microscopy to characterise the deposition. We find that the morphological nature of the Cu(110) surface results in a different surface reconstruction for the same conditions of Pd deposition.
Catalytic Enantioselective Protonation of Gold Enolates Enabled by Cooperative Gold(I) Catalysis
作者:Kaylaa L. Gutman、Carlos D. Quintanilla、Liming Zhang
DOI:10.1021/jacs.3c11919
日期:2024.2.14
common structural motifs in various natural products and biologically relevant compounds. Herein we report a mild access to these chiral centers using cooperative gold(I) catalysis. From cyclic ketone enol carbonates, this asymmetric catalysis provides highly enantioselective access to cyclic ketones featuring an α tertiary chiral center, including challenging 2-methylsuberone. In combination with the
Synthesis of Multicyclic Pyridine and Quinoline Derivatives via Intramolecular C−H Bond Functionalization
作者:Sirilata Yotphan、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/ol101002b
日期:2010.7.2
An efficient method is reported for the preparation of multicyclic pyridines and quinolines by a rhodium-catalyzed intramolecular C H bond functionalization process. The method shows good scope for branched and unbranched alkyl substituents on the pyridine ring and at the R position of the tethered alkene group. Starting materials capable of undergoing olefin isomerization to provide terminal 1,1-disubstituted alkenes also proved to be effective substrates.
Masuda, Satoru; Kuwahara, Shigefumi; Suguro, Toshio, Agricultural and Biological Chemistry, 1981, vol. 45, # 11, p. 2515 - 2520