The synthesis of trianglimines: on the scope and limitations of the [3 + 3] cyclocondensation reaction between (1R,2R)-diaminocyclohexane and aromatic dicarboxaldehydes
作者:Nikolai Kuhnert、Giulia M. Rossignolo、Ana Lopez-Periago
DOI:10.1039/b212102f
日期:2003.3.27
The synthesis of aromatic dicarboxaldehydes, using dilithiation methodology is described along with their reactivity, in the [3 + 3] cyclocondensation reaction, with (1R,2R)-diaminocyclohexane to give trianglimine macrocycles. The scope and limitations of the cyclocondensation reaction are studied and some comments on the properties of the novel macrocycles are made such as their conformation in solution
Total Synthesis of Hamigerans and Analogues Thereof. Photochemical Generation and Diels−Alder Trapping of Hydroxy-<i>o</i>-quinodimethanes
作者:K. C. Nicolaou、David L. F. Gray、Jinsung Tae
DOI:10.1021/ja030498f
日期:2004.1.1
and subsequent Diels-Alder (PEDA) trapping of the generated hydroxy-o-quinodimethanes, this method was optimized to set the stage for the total synthesis of several naturally occurring members of the hamigeran class. Specifically, the developed synthetic technology served as the centerpiece process for the successful asymmetric synthesis of hamigerans A (2), B (3), and E (7). In addition to the PEDA reactions
许多天然存在的物质,包括hamigerans,包含与芳香核稠合的环系统。已经开发了一种用于构建这种苯并环双环和多环碳框架的通用和简化的方法,并探讨了其范围和局限性。在取代苯甲醛的光烯醇化和随后的狄尔斯-阿尔德 (PEDA) 捕获生成的羟基-o-醌二甲烷的基础上,优化了该方法,为几种天然存在的 hamigeran 类成员的全合成奠定了基础。具体而言,开发的合成技术是成功不对称合成 hamigerans A (2)、B (3) 和 E (7) 的核心过程。除了 PEDA 反应外,还描述了其他几种新的反应过程,包括高产率的脱羰环收缩和羟基β-酮酯的氧化脱羧以提供α-二酮。这些具有生物活性的天然产物的许多类似物也通过应用开发的技术制备。
[EN] DIAMINOCYCLOHEXANE COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS DE DIAMINOCYCLOHEXANE ET LEURS UTILISATIONS
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2013012827A1
公开(公告)日:2013-01-24
The present invention provides compounds of Formula (I), or a stereoisomer, or a pharmaceutically acceptable salt thereof, wherein all of the variables are as defined herein. These compounds are agonists, partial agonists and modulators of the NPY Y4 receptor and may be used for the treatment and prophylaxis of various diseases and conditions.
Conversion of 1,4-Dihydrobenzoic Acids to Polyformylbenzenes under Vilsmeier Reaction Conditions
作者:B. Raju、G. S. Krishna Rao
DOI:10.1055/s-1987-27890
日期:——
1,4-Dihydrobenzoic acids 1a-e are converted by a one-pot reaction to benzene- mono-, di- and tricarboxaldehydes under Vilsmeier reaction conditions in yields ranging from 6 to 65%. The same methodology also serves to give naphthalene-1,3-dicarboxaldehyde (2f) from 1,4-dihydro-1-naphthoic acid (1f) in 91% yield.
POLYMERISABLE COMPOUNDS AND THE USE THEREOF IN LIQUID-CRYSTAL MEDIA AND LIQUID-CRYSTAL DISPLAYS
申请人:MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
公开号:US20160152546A1
公开(公告)日:2016-06-02
The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays having a polymer-stabilised blue phase, and in LC media for LC displays of the PS or PSA type (“polymer sustained” or “polymer sustained alignment”), and to LC media and LC displays comprising these compounds.