One dimensional CdS nanostructures: heterogeneous catalyst for synthesis of aryl-3,3′-bis(indol-3-yl)methanes
作者:Prakash K. Chhattise、Sudhir S. Arbuj、Kakasaheb C. Mohite、Sanjay V. Bhavsar、Amit S. Horne、Kalpana N. Handore、Vasant V. Chabukswar
DOI:10.1039/c4ra03419h
日期:——
Herein, we have developed a novel heterogeneous catalytic system for synthesis of bis(indol-3-yl)methanes using one dimensional (1D) CdS nanorods. CdS nanorods were synthesized by a solvothermal reaction technique at 200 °C over 12 h in the presence of ethylenediamine as a solvent. The prepared 1D CdS was characterized using various spectroscopic methods. X-ray diffraction (XRD) revealed the formation of highly crystalline CdS having a wurtzite structure. FESEM analysis confirms the formation of a rod like morphology with length around 150 to 200 nm and diameter â¼15 nm. TEM also validates the formation of uniform size one dimensional (1D) CdS nanostructures. The catalytic activity of 1D CdS as a Lewis acid was investigated for the synthesis of bis(indol-3-yl)methanes (BIMs) with various substituted aldehydes and indoles within shorter reaction time affording the corresponding product in excellent yield.
Expeditious, Mild and Solvent Free Synthesis of Bis(indolyl)methanes, Using a Mixture of Phosphorus Pentoxide in Methanesulphonic Acid
作者:Amulrao U. Borse、Mahesh N. Patil、Nilesh L. Patil
DOI:10.1155/2012/637536
日期:——
Highly rapid and efficient synthesis of Bis(indolyl)methanes has been developed by using a mixture of phosphorus pentoxide in methanesulphonic acid (Eaton’s reagent) at ambient temperature under solvent free condition.
ELECTROPHILIC SUBSTITUTION OF INDOLES CATALYZED BY TRIPHENYL PHOSPHONIUM PERCHLORATE: SYNTHESIS OF 3-ACETYL INDOLES AND <i>BIS</i>-INDOLYLMETHANE DERIVATIVES
作者:Rajagopal Nagarajan、Paramasivan T. Perumal
DOI:10.1081/scc-120001515
日期:2002.1.1
ABSTRACT Triphenyl phosphonium perchlorate (TPP) is found to catalyze the acetylation of indoles with acetic anhydride to give 3-acetyl indoles. Similarly bis-indolylmethane derivatives were prepared by the electrophilicsubstitution reaction of indole with substituted benzaldehydes.
This study offers a new and efficient method for the stabilization of L-proline moieties on magnetic nanoparticles in order to prepare a novel magnetic recyclable organocatalyst for application in organic transformations. The catalytic activity of this heterogeneous organocatalyst was evaluated in the condensation reaction of indoles and aldehydes for the synthesis of bis(indolyl)methanes in water.
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.