COMPOUNDS FOR THE PREVENTION AND TREATMENT OF CARDIOVASCULAR DISEASES
申请人:Wong Norman C.W.
公开号:US20080188467A1
公开(公告)日:2008-08-07
The present disclosure relates to compounds, which are useful for regulating the expression of apolipoprotein A-I (ApoA-I), and their use for treatment and prevention of cardiovascular disease and related disease states, including cholesterol- or lipid-related disorders, such as, for example, atherosclerosis.
triflate-catalyzed synthesis of 1,3-dicarbosubstituted isochromene derivatives starting from 2-alkynyl(hetero)arylaldehydes and enolizable ketones. The reaction proceeds in a cascade fashion under mild heating with complete regioselectivity. The reaction yields range from moderate to good. In some cases, the reaction gives unexpected homodimeric products. Two competitive mechanistic paths for the formation of the
Triple‐Bond Directed Csp
<sup>2</sup>
−N Bond Formation with
<i>N</i>
‐Fluorobenzenesulfonimide as Aminating Source: One‐Step Transformation of Aldehydes into Amines
作者:Sushmita、Trapti Aggarwal、Norio Shibata、Akhilesh K. Verma
DOI:10.1002/chem.201903495
日期:2019.12.13
amination of ortho‐alkynyl quinoline/pyridine aldehydes using N‐fluorobenzenesulfonimide as nitrogen source under mild reaction conditions has been described. The designed reaction strategy was triggered by trapping of fluorine by base with subsequent attack of bis(phenylsulfonyl)‐λ2‐azane on the carbonyl carbon of a heterocycle, which was gradually converted into the corresponding amine through a Curtius
The Ag(i) complexes of pyridine-containing ligands with an active pendant arm are new catalysts for an old reaction: the nitroaldol condensation. When the substrates are 2-alkynylarylaldehydes, a smart cascade cycloisomerisation process can occur.
Ag<sup>I</sup>-Catalyzed Cascade Strategy: Regioselective Access to Diversely Substituted Fused Benzimidazo[2,1-<i>a</i>]isoquinolines, Naphthyridines, Thienopyridines, and Quinoxalines in Water
bond formation on the more electrophilic alkynyl carbon, resulting in the regioselective 6-endo-dig cyclized products in good to excellent yields. The proposed mechanistic pathway for the synthesis of fused heterocycles proceedingthrough formation of ring A prior to ring B, which formed through a second intramolecular attack of the nitrogen onto the alkynyl carbon, was supported by mechanistic experiments
一种环境友好且操作简单的一锅法,用于在水中使用 AgI 作为催化剂从邻炔醛和芳胺中区域选择性串联合成多种取代的稠合苯并咪唑并 [2,1-a] 异喹啉、萘啶、噻吩并吡啶和喹喔啉被描述。该反应显示在更具亲电性的炔基碳上形成了选择性的 N-C 键,从而产生了区域选择性的 6-endo-dig 环化产物,产率很好。所提出的合成稠合杂环的机理途径是在环 B 之前形成环 A,环 B 是通过氮对炔基碳的第二次分子内攻击形成的,得到了分离的中间体 U 和环化产物 5a 的机械实验和 X 射线晶体学研究的支持。对比实验表明,分子内亲核攻击的可行性高于外部亲核试剂的分子间攻击。这种催化的绿色方案已有效地应用于水中的双串联环化。