Manipulating Micellar Environments for Enhancing Transition Metal-Catalyzed Cross-Couplings in Water at Room Temperature
作者:Bruce H. Lipshutz、Subir Ghorai、Wendy Wen Yi Leong、Benjamin R. Taft、Daniel V. Krogstad
DOI:10.1021/jo200746y
日期:2011.6.17
The remarkable effects of added salts on the properties of aqueous micelles derived from the amphiphile PTS are described. Most notably, Heck reactions run in the presence of NaCl lead to couplings on aryl bromides in water at roomtemperature. Olefin cross- and ring-closingmetathesis reactions run in the presence of small amounts of pH-lowering KHSO4 are also accelerated, another phenomenon that
Tandem olefin metathesis–elimination reactions. A new route to doubly unsaturated carbonyl derivatives
作者:Bruce H. Lipshutz、Subir Ghorai、Žarko V. Bošković
DOI:10.1016/j.tet.2008.04.027
日期:2008.7
Cross-metathesis between an activated olefin and an ethereal derivative of homoallylic alcohols leads to products that are subject to facile elimination resulting in α,β,γ,δ-unsaturated esters, ketones, acids, and aldehydes in high yields.