The present invention relates to substituted heterocyclic derivative compounds, compositions comprising said compounds, and the use of said compounds and compositions for epigenetic regulation by inhibition of bromodomain-mediated recognition of acetyl lysine regions of proteins, such as histones. Said compositions and methods are useful for the treatment of cancer and neoplastic disease.
Regioselective differentiation of vicinal methylene C–H bonds enabled by silver-catalysed nitrene transfer
作者:Ryan J. Scamp、Bradley Scheffer、Jennifer M. Schomaker
DOI:10.1039/c9cc04006d
日期:——
Silver-catalyzed nitreneinsertion enables the formation of benzosultams in good yield and with regioselectivity complementary to other transition metal nitrene-transfer catalysts. Preferential formation of six-membered benzosultam rings predominates for alkyl-substituted benzenesulphonamide precursors. Ligand-controlled tunability is also achieved for benzenesulphonamides with γ-branched alkyl substituents
Novel glycopeptide antibiotic derivatives. These derivatives are represented by the formula (aglycon part of glycopeptide antibiotic derivative)-(Sac-NH)—R
A
[wherein (aglycon part of glycopeptide antibiotic derivative) is the part formed by removing the sugar part from a known glycopeptide antibiotic derivative; (Sac-NH) part is an amino sugar part or a sugar chain part containing an amino sugar; and R
A
represents, e.g., the formula —X
1
—Ar
1
—X
2
—Y—X
3
—Ar
2
(wherein X
1
, X
2
, and X
3
each represents 1) a single bond or 2) a heteroatom or heteroatom-containing group selected from the group consisting of —N═, ═N—, —NR
1
—, —O—, etc.; Y represents —NR
2
CO— or —CONR
2
— (wherein R
2
represents hydrogen or lower alkyl), etc.)]. These derivatives have antibacterial activity against vancomycin-resistant bacteria.