Potassium Trimethylsilanolate-Mediated Conversion of Dialkyl Phosphonates to Their Anhydrous Potassium Monoalkyl Phosphonates Under Mild, Non-Aqueous Conditions
Proteasome selectivity towards Michael acceptor containing oligopeptide-based inhibitors
作者:Wouter A. van der Linden、Paul P. Geurink、Chris Oskam、Gijsbert A. van der Marel、Bogdan I. Florea、Herman S. Overkleeft
DOI:10.1039/b924134e
日期:——
The synthesis and biological evaluation of ten Michael acceptors containing potential proteasome inhibitors are described. Cellular targets of azide containing inhibitors Ib and VIIIb were assessed in HEK293T and RAW264.7 cells by a two step labeling strategy, followed by biotin-pulldown, affinity purification, on-bead tryptic digestion and LC-MS2 identification. This strategy appears to be an attractive alternative to gel-based competition assays.
Synthese von 2-Oxo-5H-furanen unter Wittig-Horner Bedingungen
作者:Gioacchino Falsone、H. Peter Wingen
DOI:10.1002/ardp.19843170913
日期:——
Es wird die Synthese der 2‐Oxo‐5H‐furane 3a‐e und 7a‐e aus den α‐Hydroxy‐oxo‐verbindungen 1a, b bzw. den α‐Halogen‐oxo‐verbindungen 5a‐e und den α‐Phosphonocarbonsäureestern 2a‐c, α‐Phosphonocarbonsäuren 4a, b bzw. den Kaliumsalzen der α‐Phosphonocarbonsäuren 6a, b unter Wittig‐Horner‐Bedingungen beschrieben.