specific chemoselectivity for hydrogenation that has never been achieved by other palladium‐catalyzed methods. Either aliphatic or aromatic N‐Cbz groups could be deprotected to the corresponding free‐amines, while the hydrogenolysis of benzyl esters and ethers did not proceed. Furthermore, aryl chlorides and epoxides were tolerant under the Pd/ceramic‐catalyzed hydrogenation conditions. 5 % Pd/ceramic
functionalities. Furthermore, the catalyst activities of both 5% Pd/SM and 0.25% Pd/SM(sc) under flowhydrogenation conditions were also evaluated. A pre-packed 5% Pd/SM cartridge could be used continuously for at least 72 h without any loss of catalyst activity. The 0.2% Pd/SM(sc) catalyst prepacked in a cartridge showed high catalyst activity for the flowhydrogenation of trisubstituted alkenes under
Role of the (acyloxy)methyl moiety in eliciting the adrenergic .beta.-blocking activity of 3-(acyloxy)propanolamines
作者:B. Macchia、A. Balsamo、A. Lapucci、F. Macchia、A. Martinelli、H. L. Ammon、S. M. Prasad、M. C. Breschi、M. Ducci、E. Martinotti
DOI:10.1021/jm00387a006
日期:1987.4
Some totally aliphatic 3-(acyloxy)propanolamines were synthesized with the aim of testing whether beta-blocking activity could be obtained from this class of drugs, even in the absence of an aromatic group. The significant and, in most cases, competitive beta-blocking activity shown by the compounds under examination, together with the results of a theoretical study in which their reactivity was compared
The present invention relates to methods, reagents, and substrates that can be used for, for example, immobilizing biomolecules, such as nucleic acids and proteins. In an embodiment, the present invention relates to surfaces coated with a polymer according to the present invention. In an embodiment, the present invention relates to methods for thermochemically and/or photochemically attaching molecules to a surface at a high density.
Addition-fragmentation agents of the formula are disclosed having the following functional groups: 1) a labile addition-fragmentation group that can cleave and reform to relieve strain, 2) a free-radically polymerizable group, and 3) a surface-modifying functional group that associates with the surface of a substrate.