Zinc Chloride Anhydrous as New and Effective Catalyst for Conversion of Ketones and Aldehydes to Corresponding Gem-dihydroperoxides
作者:Kaveh Khosravi、Samira Kazemi
DOI:10.1002/jccs.201100605
日期:2012.5
Zinc chloride anhydrous has been used as an efficient and new catalyst for conversion of ketones and aldehydes to corresponding gem‐dihydroperoxides by aqueous hydrogen peroxide (30%) in room temperature with excellent yields and notable reaction times.
(SSA) was found to efficiently catalyze the conversion of aldehydes and ketones directly into the corresponding gem-dihydroperoxides (DHPs) on treatment with aqueous 30% H2O2 at room temperature. Mild reaction conditions, good to excellent yields, short reaction times, low environmental impact, and recyclability of the catalyst are the main advantages of this synthetic method. GRAPHICAL ABSTRACT
Iodine-catalyzed one-pot synthesis and antimalarial activity evaluation of symmetrically and asymmetrically substituted 3,6-diphenyl[1,2,4,5]tetraoxanes
作者:Nitin Kumar、Shabana I. Khan、Mukul Sharma、Himanshu Atheaya、Diwan S. Rawat
DOI:10.1016/j.bmcl.2009.01.103
日期:2009.3
A novel iodine-catalyzed one-pot synthesis of symmetrically and asymmetrically substituted 3,6-diphenyl[1,2,4,5] tetraoxanes is described. The synthetic protocol is general with substituted benzaldehydes and proceeds well under acidic conditions. Total 17 tetraoxanes have been prepared during this study and some of these compounds exhibit promising antimalarial activity. None of the compounds shows any toxicity against vero cells. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of <i>in vitro</i> and <i>in vivo</i> anti<i>-Toxoplasma gondii</i> activity of tetraoxane-substituted ursolic acid derivatives