Synthesis and applications of tert-alkoxysiloxane linkers in solid-phase chemistry
作者:Marco M. Meloni、Peter D. White、Duncan Armour、Richard C.D. Brown
DOI:10.1016/j.tet.2006.10.052
日期:2007.1
Straightforward syntheses of two tert-alkoxysilyl chloride functionalised resins 3 and 31 that allow facile attachment of 1 degrees, 2 degrees, 3 degrees alcohols and phenols to the solid-phase have been achieved. Resin 3 displayed useful loading levels (0.7 mmol/g), and it was stable to storage in activated form. Siloxanes from reaction of 3 with alcohols and phenols were compatible with a variety of reaction conditions commonly used in solid-phase synthesis. (c) 2006 Published by Elsevier Ltd.
Tandem olefin metathesis/hydrogenation at ambient temperature: activation of ruthenium carbene complexes by addition of hydrides
作者:Bernd Schmidt、Michael Pohler
DOI:10.1039/b303441k
日期:——
catalyze hydrogenation reactions subsequent to ring closing olefinmetathesis. Under these conditions, hydrogenation of cyclopentenols proceeds smoothly at ambient temperature and under 1 atm of hydrogen in toluene. An alternative protocol was developed that involves the formation of hydrogen in situ by reaction of excess sodium hydride with protic functional groups and water.