Design of chiral boronate-substituted acrylanilides.
摘要:
The [4 + 2] cycloaddition of ortho-boronoanilide dienophile 4 with cyclopentadiene was found to proceed faster than both its para isomer 8 and the unsubstituted derivative 6, thereby confirming that self-activation by internal coordination is operative in the case of 4. Chiral boronic esters derivatives 9-13 provided a small level of remote 1,8-stereoinduction transmitted through a putative tetrahedral stereogenic boronate complex. These results show that dialkoxyboronic esters can operate as weak, internal Lewis acids and activate carbonyl-containing functionalities in cycloaddition reactions. (C) 2003 Elsevier B.V. All rights reserved.
SULFONE AMIDE LINKED BENZOTHIAZOLE INHIBITORS OF ENDOTHELIAL LIPASE
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20160326125A1
公开(公告)日:2016-11-10
The present invention provides compounds of Formula (I) as defined in the specification and compositions comprising any of such novel compounds. These compounds are endothelial lipase inhibitors which may be used medicaments.
[EN] SULFONE AMIDE LINKED BENZOTHIAZOLE INHIBITORS OF ENDOTHELIAL LIPASE<br/>[FR] COMPOSÉS BENZOTHIAZOLE À LIAISON AMIDE SULFONE UTILISÉS EN TANT QU'INHIBITEURS DE LA LIPASE ENDOTHÉLIALE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2015105749A1
公开(公告)日:2015-07-16
The present invention provides compounds of Formula (I) as defined in the specification and compositions comprising any of such novel compounds. These compounds are endothelial lipase inhibitors which may be used medicaments.
Solvent-free <i>N</i>-Boc deprotection by <i>ex situ</i> generation of hydrogen chloride gas
作者:Rik H. Verschueren、Philippe Gilles、Seger Van Mileghem、Wim M. De Borggraeve
DOI:10.1039/d1ob00728a
日期:——
protecting group is described, using down to near-stoichiometric amounts of hydrogenchloridegas in solvent-free conditions. We demonstrate the ex situ generation of hydrogenchloridegas from sodium chloride and sulfuric acid in a two-chamber reactor, introducing a straightforward method for controlled and stoichiometric release of HCl gas. The solvent-free conditions allow deprotection of a wide variety of
描述了一种有效、可扩展且可持续的方法,用于在无溶剂条件下使用低至接近化学计量的氯化氢气体对氨基甲酸叔丁酯 ( N -Boc) 保护基团进行定量脱保护。我们展示了在两室反应器中从氯化钠和硫酸异位生成氯化氢气体,介绍了一种用于控制和化学计量释放 HCl 气体的简单方法。无溶剂条件允许对多种N进行脱保护-Boc衍生物以定量产率获得盐酸盐。该程序消除了对任何后处理或纯化步骤的需要,为标准方法提供了一种简单的绿色替代方案。由于无溶剂、无水条件,该方法对酸敏感官能团具有高耐受性,并提供扩展的官能团正交性。
Design of chiral boronate-substituted acrylanilides.
作者:Jason W.J Kennedy、Dennis G Hall
DOI:10.1016/s0022-328x(03)00400-5
日期:2003.8
The [4 + 2] cycloaddition of ortho-boronoanilide dienophile 4 with cyclopentadiene was found to proceed faster than both its para isomer 8 and the unsubstituted derivative 6, thereby confirming that self-activation by internal coordination is operative in the case of 4. Chiral boronic esters derivatives 9-13 provided a small level of remote 1,8-stereoinduction transmitted through a putative tetrahedral stereogenic boronate complex. These results show that dialkoxyboronic esters can operate as weak, internal Lewis acids and activate carbonyl-containing functionalities in cycloaddition reactions. (C) 2003 Elsevier B.V. All rights reserved.