The invention relates to novel pyrrolidine derivatives of formula (I):
wherein R
1
, R
2
and R
3
are as defined herein, as inhibitors of glutaminyl cyclase (QC, EC 2.3.2.5). QC catalyzes the intramolecular cyclization of N-terminal glutamine residues into pyroglutamic acid (5-oxo-prolyl, pGlu*) under liberation of ammonia and the intramolecular cyclization of N-terminal glutamate residues into pyroglutamic acid under liberation of water.
[EN] SUBSTITUTED PYRAZOLO[1,5-a]PYRIMIDINE COMPOUNDS AS mTOR INHIBITORS<br/>[FR] COMPOSÉS PYRAZOLO[1,5-A]PYRIMIDINE SUBSTITUÉS UTILISÉS COMME INHIBITEURS DE MTOR
申请人:ARRAY BIOPHARMA INC
公开号:WO2011029027A1
公开(公告)日:2011-03-10
Compounds of Formula I: and salts thereof in which R1, R2, R2a, R3, n, X and ring B have the meanings given in the specification, are inhibitors of mTOR and are useful in the treatment of diseases which are sensitive to inhibition of mTOR, such as cancers.
Herein, we report the development of a tailored cobalt catalyst system of Cp*Co(III)(LX) toward intramolecular C-H nitrene insertion of azidoformates to afford cyclic carbamates. The cobalt complexes were easy to prepare and bench-stable, thus offering a convenient reaction protocol. The catalytic reactivity was significantly improved by the electronic tuning of the bidentate LX ligands, and the observed
Enzymatic C(sp<sup>3</sup>)-H Amination: P450-Catalyzed Conversion of Carbonazidates into Oxazolidinones
作者:Ritesh Singh、Joshua N. Kolev、Philip A. Sutera、Rudi Fasan
DOI:10.1021/cs5018612
日期:2015.3.6
stereoselectivity. Mechanistic studies and KIE experiments show that the C–H activation step in these reactions is rate-limiting and proceeds in a stepwise manner, namely, via hydrogen atom abstraction followed by radical recombination. This study expands the reactivity scope of P450-based catalysts in the context of nitrene transfer transformations and provides first-time insights into the mechanism
Organotellurium-mediated synthesis of oxazolidin-2-ones from alkenes
作者:Nan X. Hu、Yoshio Aso、Tetsuo Otsubo、Fumio Ogura
DOI:10.1039/c39870001447
日期:——
Phenyltellurinyl trifluoracetate in combination with ethyl carbamate and boron trifluoride–diethyl ether reacted with alkenes in refluxed 1,2-dichloroethane, regio- and stereo-selectively giving oxazolidin-2-ones in high yields.