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.
US8778874B2
申请人:——
公开号:US8778874B2
公开(公告)日:2014-07-15
Mild-Base-Promoted Arylation of (Hetero)Arenes with Anilines
作者:Diego M. Monzón、Tanausú Santos、F. Pinacho-Crisóstomo、Víctor S. Martín、Romen Carrillo
DOI:10.1002/asia.201701585
日期:2018.2.2
Transition metal‐free radical arylation of heteroarenes is achieved at room temperature by simply adding aqueous sodium carbonate to a solution of the corresponding heteroarene and arenediazonium salt, which can even be formed in situ. Such an easy, inexpensive and mild methodology has been optimized and applied to the expeditious modification of interesting molecular cores like naphthylimide or b