Profiling the reactivity of cyclic C-nucleophiles towards electrophilic sulfur in cysteine sulfenic acid
作者:Vinayak Gupta、Kate S. Carroll
DOI:10.1039/c5sc02569a
日期:——
Oxidation of a protein cysteine thiol to sulfenic acid, termedS-sulfenylation, is a reversible post-translational modification that plays a crucial role in regulating protein function and is correlated with disease states.
Direct 4-Alkylation of 1,3-Cyclohexanediones via Dianionic Species
作者:Nicola M. Berry、Mark C. P. Darey、Laurence M. Harwood
DOI:10.1055/s-1986-31679
日期:——
1,3-Cyclohexanediones are directly alkylated at the 4 position via dianionic species generated at - 78°C using lithium diisopropylamide/hexamethylphosphoric triamide. Acetylation of the reaction products at room temperature yields the 3-acetoxy-6-alkylcyclohex-2-enones selectively.
Novel tetrahydropyrazolo-[3,4-b]quinolinones, cyclo- benta[b]pyrazolo-[4,3-e]pyridinones and cyclohepta[b]-pyraz- olo-[4,3-e]pyridinones are disclosed useful as anxiolytics hav- ng reduced side effects are disclosed, including methods of preparation, pharmaceutical compositions containing them and intermediates used in their preparation.