Sodium borohydride or potassium carbonate-mediated intramolecular Michael addition: a general method for the synthesis of fused dihydrofuran and furan derivatives
摘要:
A simple and convenient method for the synthesis of fused dihydrofuran derivatives using NaBH4-mediated reductive cyclization and fused furan derivatives by K2CO3-mediated intramolecular Michael addition followed by acid-catalyzed methanol elimination has been developed. (C) 2009 Elsevier Ltd. All rights reserved.
N-substituted pyrrole derivatives and their application to construct macrocyclic oxazocinone via a two-component coupling reaction followed by base mediated intramolecular cyclization. This methodology provides an easy two-step approach to constitute a library of fused pyrrolo-oxazocinone derivatives in good yields under mild reaction conditions. The present methodology offers an easy access to the synthesis
在本文中,我们报道了N-取代的吡咯衍生物的有效合成及其在通过两组分偶联反应,然后通过碱介导的分子内环化反应来构建大环恶唑烷酮中的应用。该方法提供了一种简单的两步法,可以在温和的反应条件下以高收率构建稠合的吡咯并恶唑啉酮衍生物库。本方法提供了容易获得荧光吡咯衍生物文库的合成的途径。其中,叔丁基2-(2-(3-羟丙基)-7-甲氧基-4,5-二氢- 2 H ^ -苯并[ ë] isoindol-1-yl)acetate已用于生物分析成像,显示有效的细胞内化作用,没有明显的细胞毒性。
Urea‐Promoted Neat Synthesis of Fused Dihydroisoquinolines and Disubstituted Pyridines: A Mechanistic Observation with Molecular‐Sensing Studies
A concise and efficient synthesis of fused isoquinolines has been established by using an environmentally friendly neat approach. In this method, the electrocyclic reaction is emphasized over the typical aza-Michael addition. This green methodology allows the synthesis of various isoquinolines, including the alkaloid decumbenine B and a fluorophore that selectively detects picric acid.
通过使用环境友好的纯净方法,建立了稠合异喹啉的简洁有效的合成方法。在该方法中,电环反应比典型的氮杂迈克尔加成更重要。这种绿色方法可以合成各种异喹啉,包括生物碱 decumbenine B 和选择性检测苦味酸的荧光团。