Reduction of Activated Alkenes by P
<sup>III</sup>
/P
<sup>V</sup>
Redox Cycling Catalysis
作者:Lars Longwitz、Thomas Werner
DOI:10.1002/anie.201912991
日期:2020.2.10
using a phosphetane oxide catalyst in the presence of a simple organosilane as the terminal reductant and water as the hydrogen source. Quantitative hydrogenation was observed when 1.0 mol % of a methyl‐substituted phosphetane oxide was employed as the catalyst. The procedure is highly selective towards activated double bonds, tolerating a variety of functional groups that are usually prone to reduction
Facile and Convenient Method of Deuterium Gas Generation Using a Pd/C-Catalyzed H2–D2 Exchange Reaction and Its Application to Synthesis of Deuterium-Labeled Compounds
The Pd/C-catalyzed H(2)-D(2) exchange reaction using a H(2)-D(2)O combination provided a general, efficient and environmentally friendly route for the preparation of deuterium gas (D(2)). H(2) sealed in a reaction flask was converted into nearly pure D(2), which could be used for the Pd/C-catalyzedone-potreductive deuteration of various reducible functionalities and the chemoselective one-pot deuterogenation
A general and in situ D-2 gas generation method using 10% Pd/C-catalyzed H-2-D-2 exchange reaction in a H-2-D2O system has been developed. H-2 gas sealed in a reaction flask was efficiently converted into nearly pure D-2 gas, which can be used for the reductive deuteration of substrates possessing reducible functionalities within the molecule.
Gerson, Fabian; Gescheidt, Georg; Knöbel, Jürgen, Journal of the American Chemical Society, 1992, vol. 114, # 18, p. 7107 - 7115
作者:Gerson, Fabian、Gescheidt, Georg、Knöbel, Jürgen、Martin Jr., William B.、Neumann, Ludger、Vogel, Emanuel
DOI:——
日期:——
Infrared intensities: cyclobutene. A normal-coordinate analysis and comparison with cyclopropene
作者:Kenneth B. Wiberg、Robert E. Rosenberg
DOI:10.1021/j100200a016
日期:1992.10
The infrared and Raman spectra of cyclobutene and of its 1,2-d2 and 3,3,4,4-d4 isotopomers were determined, and the intensities of the infrared bands were measured. A new vibrational assignment was made with the help of the spectrum calculated using the 6-31G* basis set. A normal-coordinate analysis was carried out, and the infrared intensities were converted to atomic polar tensors and to dipole moment derivatives with respect to symmetry coordinates. The results of this investigation are compared with similar data obtained previously for cyclopropene and with corresponding data for cyclopropane, ethylene, and propane.