catalytic process for vicinal difunctionalization of alkenes using heteroatom nucleophiles and aliphatic redox active esters. A wide range of heteroatom nucleophiles including alcohols, water, carboxylicacids, amides, and halogens can be used for this reaction. This radical relay type reaction allows forging of C(sp3)–C(sp3) with a carbon-centered radical and C(sp3)–heteroatom bonds with a benzyl
first-order kinetics and seems to be mainly an enthalpic process with a small negative activation entropy, as revealed by polarimetric measurements at low temperatures. This is in accordance with Cα–S bondrotation as the rate-determining step. The salts [R1C(R2)SO2tBu]Li have half-lives of racemization in the order of several hours at –105 °C. The deuteriation of the salts at –105 °C with CF3CO2D
作者:Truc-Vi H. Duong、Todd S. Carroll、Daniel S. Bejan、Edward J. Valente
DOI:10.1007/s10870-019-00813-5
日期:2020.12
Abstract In the solid state, some 3-substituted 4-hydroxycoumarins β-ketoester enols form infinite translational hydrogen-bonded β-chains with varying degrees of alignment between adjacent delocalized systems. Nine related structures have been studied. At the strongest, intermolecular associations are polar, purely translation neighbors interact essentially along a 717 pm crystallographic repeat with
By judicious choice of the counter anions in the vanadyl catalysts, we can achieve β-hydroxylated and t-butyl peroxylated carbonylation of styrenes by aromatic 1° and 2° alkyl aldehydes in a complementary manner.
The invention relates to the inhibition of DNA methyltransferase isoforms DNMT1 and DNMT3b2. The invention provides compounds and methods for inhibiting DNMT1 and DNMT3b2.