One-pot multistep synthesis of 3,4-fused isoquinolin-1(2H)-one analogs
作者:Lianhai Li、Waepril Kimberly S. Chua
DOI:10.1016/j.tetlet.2011.01.089
日期:2011.4
We have developed a robust approach for the synthesis of 3,4-fused isoquinolin-1(2H)-one analogs. A benzonitrile or a nicotinonitrile bearing an ortho-substituent, such as –OH, –SH, or –NHR (R = alkyl or aryl) can be deprotonated by KOtBu and then reacted with methyl 2-(bromomethyl)benzoate (8) to form its corresponding O-, S-, or N-alkylation product. The product thus formed is then treated with KOtBu
我们已经开发了一种强大的方法,用于合成3,4-融合的异喹啉-1(2H)-one类似物。带有邻位取代基(例如–OH,–SH或–NHR(R =烷基或芳基))的苄腈或烟腈可以通过KO t Bu进行质子化,然后与2-(溴甲基)苯甲酸甲酯反应(8)形成其相应的O-,S-或N-烷基化产物。然后将如此形成的产物再次用KO t Bu处理以引发级联过程,该级联过程将导致其相应的3,4-稠合的异喹啉-1(2H)-一的形成。这种多步合成以及最终产物的纯化可以一锅法完成。
THIAZOLIDINE DERIVATIVES AND MEDICINAL USE THEREOF
申请人:SAKASHITA Hiroshi
公开号:US20070259880A1
公开(公告)日:2007-11-08
A thiazolidine derivative represented by the formula (I)
wherein each symbol is as defined in the specification, and a pharmaceutically acceptable salt thereof exhibit a potent DPP-IV inhibitory activity, and can be provided as an agent for the prophylaxis or treatment of diabetes, an agent for the prophylaxis or treatment of obesity and the like.
Substrate‐ and Catalyst‐Controlled C−H Bond Activation/Annulation for Construction of Pyrido[2,3,4‐<i>de</i>]quinazolinones and Indolo[1,2‐<i>c</i>]quinazolinones
polycyclic heterocycles, namely pyrido[2,3,4-de]quinazolinones and indolo[1,2-c]quinazolinones. The most notable advantage of this method is its ability to rapidly generate two different polycyclic scaffolds via a simple C−H activation and subsequent cyclization cascade pathway. Specifically, sulfoxonium ylides played a crucial role in both transformations, serving as a two-carbon synthon and a one-carbon
采用底物和催化剂控制的合成策略构建两种不同类型的稠合多环杂环,即吡啶并[2,3,4- de ]喹唑啉酮和吲哚[1,2- c ]喹唑啉酮。该方法最显着的优点是能够通过简单的 CH 激活和随后的环化级联途径快速生成两种不同的多环支架。具体而言,亚砜叶立德在这两种转化中都发挥了至关重要的作用,作为双碳合成子和一碳合成子,分别通过[4+2]和[4+1]环化途径独立构建两个稠合多环支架。
PYRAZOLO(3,4-B)PYRIDINE COMPOUNDS, AND THEIR USE AS PHOSPHODIESTERASE INHIBITORS