Enantioselective Synthesis of Cyclic Nitrones by Chemoselective Intramolecular Allylic Alkylation of Oximes
作者:Tobias Sandmeier、Erick M. Carreira
DOI:10.1002/anie.202100150
日期:2021.4.26
The enantio‐ and chemoselective iridium‐catalyzed N‐allylation of oximes is described for the first time. Intramolecular kinetic resolution provides access to cyclicnitrones and enantioenriched aliphatic allylic alcohols. Salient features of this transformation are its ability to employ E/Z‐isomeric mixtures of oxime starting materials convergently and high functional group tolerance. The implementation
Sigmatropic Rearrangements of Polymer Backbones: Vinyl Polymers from Polyesters in One Step
作者:Rachael A. J. Ditzler、Aleksandr V. Zhukhovitskiy
DOI:10.1021/jacs.1c09657
日期:2021.12.8
Polymer modification is a fundamental scientific challenge, as a means of both upcycling plastics and extracting a stimulus response from them. To date, the overwhelming majority of polymer modifications has focused on the polymer periphery. Herein, we demonstrate nearly quantitative, scission-free modification of polymer backbones, namely, a metamorphosis of polyesters into vinylpolymers resembling
[EN] PYRROLOPYRIDAZINE COMPOUNDS AS KINASE INHIBITORS<br/>[FR] COMPOSÉS DE PYRROLOPYRIDAZINE UTILISÉS COMME INHIBITEURS DE KINASE
申请人:GOSSAMER BIOSERVICES INC
公开号:WO2022109492A1
公开(公告)日:2022-05-27
Described herein are inhibitors of JAK kinases, pharmaceutical compositions comprising them, processes for preparing them and uses of such inhibitors to treat or prevent diseases, disorders and conditions associated with kinase function.
Synthesis of β-Aminocyclohexanones and β-Aminocyclohexanols through an Intramolecular Tandem Isomerization-Mannich Reaction as a Key Step
作者:René Grée、Hai Cao、Danielle Grée
DOI:10.1055/s-0030-1260195
日期:2011.10
New β-aminocyclohexanones and β-aminocyclohexanols, with a primary amino group, have been obtained by a short and efficient sequence involving an intramoleculartandemisomerization-Mannichreaction as the key step. This methodology takes advantage of tert-butanesulfinyl protection of the nitrogen atom. isomerization - catalysis - nickel - carbocycles - Mannich
Pd/Et3B and Pd/Et2Zn systems promote the nucleophilic allylations of 2-aminotetrahydrofuran and 2-aminotetrahydropyran with allylic alcohols to provide omega-hydroxyhomoallylamines in high yields. The transformation is applicable to the allylation of non-protective carbohydrates, such as ribose and deoxyribose. (C) 2010 Elsevier Ltd. All rights reserved.