Unsymmetrical 1,1-diborated multisubstituted sp<sup>3</sup>-carbons formed via a metal-free concerted-asynchronous mechanism
作者:Ana B. Cuenca、Jessica Cid、Diego García-López、Jorge J. Carbó、Elena Fernández
DOI:10.1039/c5ob01523e
日期:——
unsymmetrical 1,1-diboration of diazo compounds, formed in situ from aldehydes and cyclic and non-cyclic ketones, in the absence of any transition metal complex. The heterolytic cleavage of the mixed diboron reagent, Bpin–Bdan, and the formation of two geminal C–Bpin and C–Bdan bonds has been rationalised based on DFT calculations to occur via a concerted-asynchronous mechanism. Diastereoselection is attained
[EN] NOVEL 5 OR 8-SUBSTITUTED IMIDAZO [1, 5-a] PYRIDINES AS INDOLEAMINE AND/OR TRYPTOPHANE 2, 3-DIOXYGENASES<br/>[FR] NOUVELLES IMIDAZO[1,5-A]PYRIDINES SUBSTITUÉES EN 5ÈME OU 8ÈME POSITION EN TANT QU'INDOLEAMINE ET/OU TRYPTOPHANE 2,3-DIOXYGÉNASES
申请人:BEIGENE LTD
公开号:WO2016161960A1
公开(公告)日:2016-10-13
Disclosed herein are 5 or 8-substituted imidazo[l,5-a]pyridines and pharmaceutical compositions comprising at least one such 5 or 8-substituted imidazo[l,5-a]pyridines, processes for the preparation thereof, and the use thereof in therapy. Disclosed herein are certain 5 or 8- substituted imidazo[l,5-a]pyridines that can be useful for inhibiting indoleamine 2,3- dioxygenase and/or tryptophane 2,3-dioxygenase and for treating diseases or disorders mediated thereby.
5 or 8-substituted imidazo[1, 5-a] pyridines as indoleamine and/or tryptophane 2, 3-dioxygenases
申请人:BeiGene, Ltd.
公开号:US10280163B2
公开(公告)日:2019-05-07
Disclosed herein are 5 or 8-substituted imidazo[1,5-a]pyridines and pharmaceutical compositions comprising at least one such 5 or 8-substituted imidazo[1,5-a]pyridines, processes for the preparation thereof, and the use thereof in therapy. Disclosed herein are certain 5 or 8-substituted imidazo[1,5-a]pyridines that can be useful for inhibiting indoleamine 2,3-dioxygenase and/or tryptophane 2,3-dioxygenase and for treating diseases or disorders mediated thereby.
5 or 8-substituted imidazo[1,5-a]pyridines as indoleamine and/or tryptophane 2,3-dioxygenases
申请人:BeiGene, Ltd.
公开号:US10647714B2
公开(公告)日:2020-05-12
Disclosed herein are 5 or 8-substituted imidazo[1,5-a]pyridines and pharmaceutical compositions comprising at least one such 5 or 8-substituted imidazo[1,5-a]pyridines, processes for the preparation thereof, and the use thereof in therapy. Disclosed herein are certain 5 or 8-substituted imidazo[1,5-a]pyridines that can be useful for inhibiting indoleamine 2,3-dioxygenase and/or tryptophane 2,3-dioxygenase and for treating diseases or disorders mediated thereby.
Catalyst-Free Synthesis of Spiropyrazolines from Chalcones and Cyclic Ketone N-Tosylhydrazones
作者:Hui-Jing Li、Yan-Chao Wu、Qin-Xi Wu、Hong-Shuang Wang、Zhen-Guo Zhang、Chen-Chao Wang
DOI:10.1055/s-0034-1379616
日期:——
Treatment of cyclic ketone N-tosylhydrazones with chalcones in the presence of cesium carbonate at 110 degrees C affords spiropyrazolines with high selectivity and excellent yields. This protocol possesses many advantages such as readily available and stable starting materials, high selectivity, operational simplicity, and catalyst-free conditions.