利用硼氢化钠(NaBH 4)还原铁(II)盐开发了一种高效,可持续和绿色的方法,用于合成选择性斜方铁(草酸盐)封端的Fe(0)[Fe(ox)–Fe(0)]纳米材料。在草酸存在下于室温下在水中。报告的方法是一种在不进行高温煅烧的情况下以克级生产Fe(ox)–Fe(0)纳米材料的经济有效的化学途径。在室温下,露天将Fe(0)氧化为Fe 3 O 4会导致克重草酸盐封端的Fe 3 O 4 [Fe(ox)–Fe 3 O 4 ]纳米材料。Fe(ox)–Fe 3 O 4发现纳米材料可用作磁性回收的催化剂,用于从水中醛和吲哚之间的缩合选择性合成双(吲哚基)甲烷。所制备的Fe(ox)–Fe 3 O 4纳米材料还具有出色的作为可重复使用的催化剂在紫外线辐射下降解亚甲基蓝(MB)的能力,并有望在许多其他应用中使用。水性反应介质,易于合成,使用外部磁体轻松分离催化剂以及催化剂的高效回收利用使该方案经济且可持续。
Unmodified ‘chitosan in water’ as an efficient and recyclable heterogeneous catalytic system for the synthesis of bis(indolyl)methanes
作者:Navneet Taya、Jyoti Agarwal
DOI:10.1016/j.apcata.2023.119539
日期:2024.1
and environment friendly method has been developed for the synthesis of bis(indolyl)methanes using chitosan in aqueous medium. The use of commercially available chitosan without any modifications eliminated the need of toxic metal catalysts and minimized the cost and waste generation. The optimized reaction conditions involved the use of water as solvent at reflux temperature for the model reaction between
Discovery of 3,3′-diindolylmethanes as potent antileishmanial agents
作者:Sandip B. Bharate、Jaideep B. Bharate、Shabana I. Khan、Babu L. Tekwani、Melissa R. Jacob、Ramesh Mudududdla、Rammohan R. Yadav、Baljinder Singh、P.R. Sharma、Sudip Maity、Baldev Singh、Ikhlas A. Khan、Ram A. Vishwakarma
DOI:10.1016/j.ejmech.2013.02.024
日期:2013.5
An efficient protocol for synthesis of 3,3'-diindolylmethanes using recyclable Fe-pillared interlayered clay (Fe-PILC) catalyst under aqueous medium has been developed. All synthesized 3,3'-diindolylmethanes showed promising antileishmanial activity against Leishmania donovani promastigotes as well as axenic amastigotes. Structure-activity relationship analysis revealed that nitroaryl substituted diindolylmethanes showed potent antileishmanial activity. The 4-nitrophenyl linked 3,3'-diindolylmethane 8g was found to be the most potent antileishmanial analog showing IC50 values of 7.88 and 8.37 mu M against both L donovani promastigotes and amastigotes, respectively. Further, a pharmacophore based QSAR model was established to understand the crucial molecular features of 3,3'-diindolylmethanes essential for potent antileishmanial activity. These compounds also exhibited promising antifungal activity against Cryptococcus neoformans, wherein fluorophenyl substituted 3,3'-diindolylmethanes were found to be most potent antifungal agents. Developed synthetic protocol will be useful for economical and eco-friendly synthesis of potent antileishmanial and antifungal 3,3'-diindolylmethane class of compounds. (C) 2013 Elsevier Masson SAS. All rights reserved.
Oxalate capped iron nanomaterial: from methylene blue degradation to bis(indolyl)methane synthesis
high-temperature calcination. The oxidation of Fe(0) to Fe3O4 at roomtemperature in open air leads to Fe-oxalate capped Fe3O4 [Fe(ox)–Fe3O4] nanomaterial on the gram scale. The Fe(ox)–Fe3O4 nanomaterial is found to be useful as a magnetically recoverable catalyst for the selective synthesis of bis(indolyl)methanes from the condensation between aldehydes and indoles in water. The as-prepared Fe(ox)–Fe3O4
利用硼氢化钠(NaBH 4)还原铁(II)盐开发了一种高效,可持续和绿色的方法,用于合成选择性斜方铁(草酸盐)封端的Fe(0)[Fe(ox)–Fe(0)]纳米材料。在草酸存在下于室温下在水中。报告的方法是一种在不进行高温煅烧的情况下以克级生产Fe(ox)–Fe(0)纳米材料的经济有效的化学途径。在室温下,露天将Fe(0)氧化为Fe 3 O 4会导致克重草酸盐封端的Fe 3 O 4 [Fe(ox)–Fe 3 O 4 ]纳米材料。Fe(ox)–Fe 3 O 4发现纳米材料可用作磁性回收的催化剂,用于从水中醛和吲哚之间的缩合选择性合成双(吲哚基)甲烷。所制备的Fe(ox)–Fe 3 O 4纳米材料还具有出色的作为可重复使用的催化剂在紫外线辐射下降解亚甲基蓝(MB)的能力,并有望在许多其他应用中使用。水性反应介质,易于合成,使用外部磁体轻松分离催化剂以及催化剂的高效回收利用使该方案经济且可持续。