A Green Synthesis of 1,5-Benzodiazepines using Reusable-Heterogeneous Silica Sulfuric
Acid Catalyst under Solvent-Free Conditions and their Antileukemic Activity
作者:Kachigere B. Harsha、Chandagirikoppal V. Kavitha、Toreshettahally R. Swaroop、Shobith Rangappa、Kanchugarakoppal S. Rangappa
DOI:10.14233/ajchem.2021.23103
日期:——
ketones containg α-hydrogen atoms by means of simple cyclocondensation via sp3 C-H activation promoted by an efficient heterogeneous silica sulfuric acidcatalyst. Eco-friendliness, good yields, easy workup, reusable catalyst, short reaction times, high atom economy and solvent-freeconditions are the noteworthy features of this protocol. These benzodiazepines are chosen for the evaluation of antiproliferative
Alum-Catalyzed One-Pot Solventless Synthesis of 1,5-Benzodiazepines
作者:Deepali Mahajan、Tahira Naqvi、Rattan Lal Sharma、Kamal K. Kapoor
DOI:10.1071/ch07316
日期:——
Alum [KAl(SO4)2∙12H2O] was found to be an efficient, non-toxic, cheap, and environmentally benign catalyst for the synthesis of 1,5-benzodiazepines, in good to excellent yields, from the condensation of 1 mole of o-phenylenediamine with 2 moles of ketone under solvent-free conditions.
Silica gel-supported sulfuric acid catalyzed synthesis of 1,5-benzodiazepine derivatives
作者:D. Shobha、M. Adharvana Chari、K. Mukkanti、K. H. Ahn
DOI:10.1002/jhet.174
日期:2009.9
Silica gel-supported sulfuricacid has been found to be an efficient catalyst for the synthesis of 1,5-benzodiazepines from o-phenylenediamine and ketones in acetonitrile solvent. This method is simple, effective, and environmentally friendly and gives better yields. Compared to the classical reaction conditions, this new method consistently has the advantage of excellent yields (80–97%) and short
Novel, reusable, and efficient (Cd, Zn) S nanocatalysts were prepared by simple and economical chemical bath deposition using a greener approach. The as-synthesized catalysts were characterized by XRD, SEM, TEM, and FT-IR spectroscopy. The catalytic activity of as-prepared nanocatalysts were examined for the synthesis of 1,5-benzodiazepines and its derivatives under solvent-free conditions without using any toxic materials. It has been observed that CdS nanocatalyst shows superior catalytic activity and is recyclable and reusable for ten runs without any significant loss.
Zirconium tetrachloride efficiently catalyzes the cyclocondensation reaction of o-phenylenediamine and a ketone in refluxing 1,2-dichloroethane to afford the corresponding 2,3-dihydro-1H-1,5-benzod...