that 6-halouracils substituted at position C5 by certain hydrophobic groups exhibit significant inhibitory activity against this enzyme. The most potent compounds bear a five- or six-membered cyclic substituent containing a pi-electron system at C5 and a chlorine atom attached at C6. 6-Chloro-5-cyclopent-1-en-1-yluracil 7a is the most efficient derivative in this study, with Ki = 0.20 +/- 0.03 microM
Regioselective magnesiations of functionalized arenes and heteroarenes using TMP<sub>2</sub>Mg in hydrocarbons
作者:Andreas Hess、Nurtalya Alandini、Hasret C. Guelen、Jan P. Prohaska、Paul Knochel
DOI:10.1039/d2cc03856k
日期:——
hydrocarbon-soluble magnesium amide TMP2Mg (TMP = 2,2,6,6-tetramethylpiperidyl). This base showed excellent properties for the regioselective magnesiation of various arenes and heteroarenes bearing ethyl esters and carbamates under very mild reaction conditions. Subsequent trapping with aryl iodides (Negishi cross-coupling) gave access to a range of highly functionalized valuable buildingblocks.