A cyclosporin derivative of general Formula (I) or a pharmaceutically compatible salt thereof, which have a pharmaceutical effectiveness, for example in the case of chronic inflammatory diseases. The cyclosporin derivatives are preferably free from a peptide section capable of passing through the membrane of a biological cell.
the substrate. Specifically, instead of canonical hydroxylation, these enzymes can catalyze non-native nitrilegroup installation when an azido group is introduced. The reaction is likely to proceed through C-H bond activation by an Fe(IV)-oxo species, followed by azido-directed C≡N bond formation. These results offer a unique opportunity to investigate and expand the reaction repertoire of Fe/2OG enzymes
Remote C(sp<sup>3</sup>)–H Oxygenation of Protonated Aliphatic Amines with Potassium Persulfate
作者:Melissa Lee、Melanie S. Sanford
DOI:10.1021/acs.orglett.6b03731
日期:2017.2.3
the development of a method for selective remoteC(sp3)–H oxygenation of protonated aliphatic amines using aqueous potassium persulfate. Protonation serves to deactivate the proximal C(sp3)–H bonds of the amine substrates and also renders the amines soluble in the aqueous medium. These reactions proceed under relatively mild conditions (within 2 h at 80 °C with amine as limiting reagent) and do not
The present invention relates to novel phalloidin derivatives and their fluorescent dye conjugates. These new compounds may be used in studies of actin dynamics in living systems. The present invention also relates to methods for preparing such compounds. The synthesis routes combine solid-phase and solution phase peptide synthesis, and has great advantage for efficient preparation of a diverse library of the phalloidin derivatives, especially for the synthesis of phalloidin.
Method for preparing (2S, 3R, 4S) -4-hydroxyisoleucine and analogues thereof
申请人:Ouazzani Jamal
公开号:US20050079587A1
公开(公告)日:2005-04-14
The invention concerns a method for preparing a-amino acids of general formula (2S-1) wherein: the group R1 represents a hydrogen atom, a group protecting the amino group or a group of formula —COOR2 wherein the group R2 represents a C1-C6 alkyl group, an aryl or aralkyl group. The invention also concerns a-amino acids of general formula (2S-1) wherein the group R1 represents a group protecting the amino group or a group of formula —COOR2 wherein the group R2 represents a C1-C6 alkyl group, an aryl or aralkyl group and their use as medicine.