Lewis Basicity Modulation of N-Heterocycles: A Key for Successful Cross-Metathesis
摘要:
Cross-metathesis involving N-heteroaromatic olefinic dervatives is disclosed. The introduction of an appropriate substitutent on the heteroaromatic ring decreases the lewis basicity of the nitrogen atom, thus preventing the deactivation of the ruthenium-centered catalyst. The reaction is quite general in terms of both N-heterocycles and olefinic partners.
Water-Compatible Synthesis of 2-Trifluoromethyl-1,3-Dioxanes
作者:Liliana Becerra-Figueroa、Alexander F. Tiniakos、Joëlle Prunet、Diego Gamba-Sánchez
DOI:10.1002/ejoc.201801367
日期:2018.12.31
A water-compatible method for the diastereoselective synthesis of 2-trifluormethyl-1,3-dioxanes is described. The reaction proceeds under mild reaction conditions using simple inorganic bases; it has a very good substrate scope and can be performed with different Michael acceptors. Additionally, the reaction products can be further functionalized, showing an excellent perspective for future applications
Cross-metathesis involving N-heteroaromatic olefinic dervatives is disclosed. The introduction of an appropriate substitutent on the heteroaromatic ring decreases the lewis basicity of the nitrogen atom, thus preventing the deactivation of the ruthenium-centered catalyst. The reaction is quite general in terms of both N-heterocycles and olefinic partners.