A New Facile Approach to Isoindole and Pyrrole Derivatives
作者:Jayanta Ray、Nasima Yasmin
DOI:10.1055/s-0029-1219563
日期:2010.4
A highly efficient protocol for the synthesis ofN-substituted di-/tetrahydroisoindole derivatives and N-substituted pyrroles fused with seven-membered rings has been developed by reaction of amines with 3-(2-formyl-cycloalkenyl) α,β-unsaturated esters or nitriles, which, in turn, were prepared from β-bromovinyl aldehydes by a Pd(0)-catalyzed Heck reaction. Bisisoindoles were also achieved by this room-temperature
One-pot synthesis of highly fluorescent polycyclic benzimidazole derivatives
作者:Susanta Kumar Manna、Suresh Kumar Mondal、Atiur Ahmed、Arabinda Mandal、Atanu Jana、Mohammed Ikbal、Shubhankar Samanta、Jayanta K. Ray
DOI:10.1039/c3ra44521f
日期:——
An efficient one pot synthesis of polycyclic benzimidazole derivatives has been developed (up to 90% yield). The protocol is very mild, metal-free, and not restricted to anhydrous conditions. It also demonstrates an example of preferential electrocyclic reaction over Michael reaction. These new benzimidazole derivatives are highlyfluorescent and show a dramatic change with pH; The characteristic bright
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。
Organocatalytic Approach for the Synthesis and Biological Studies of Naphthalene Fluorescent Probe through Hydrogen Transfer Reaction
作者:Madan Sau、Sapana Dubey、Jigyansa Sahoo、Gokarneswar Sahoo、Pragya Trivedi、Avijit Jana、Subhankar Samanta、Tapas Das
DOI:10.1002/ejoc.202201188
日期:2022.12.12
Herein we report an organocatalytic synthesis of highly fluorescent naphthalene derivatives through hydrogen atom transfer featuring neat and mild reaction conditions under air with high substrate tolerance along with atom economy by the unprecedented use of DBU, where oxidation and reduction occurred in one-pot. Synthesized compounds are utilized in photophysical studies, cytotoxic studies and cell