نتایج جستجو برای: catalytic methods

تعداد نتایج: 1948485  

A. Mirzaei A. Salmani Oskuloo M. H. Hosseini S. L. Sharifi

The special application of iron-manganese oxide nanocatalysts has been investigated in decomposition of hydrogen peroxide. In this research, iron-manganese oxide nanocomposites were synthesized by co-precipitation, sol-gel and mechanochemical methods using iron (III) nitrate, iron (II) sulfate and manganese (II) nitrate as starting materials. These nanocomposites were prepared on the variou...

Journal: :Chemical communications 2010
Bjorn ter Horst Ben L Feringa Adriaan J Minnaard

This feature article gives an overview of iterative synthetic methods for the construction of deoxypropionates, an important class of polyketides. The catalytic and non-catalytic methodologies discussed are based on highly stereoselective reactions which can be carried out in an iterative fashion. Non-catalytic methods are described first, followed by state of the art catalytic iterative protoc...

Journal: :inorganic chemistry research 2014
bahram yadollahi davud karimian valiollah mirkhani

in multi-step organic syntheses, the protection and deprotection of tetrahydropyranyl (thp) ethers is one of the most frequently used methods. over the years, different methods have been used from various catalytic systems for the protection of hydroxyl groups as thp ethers and their deprotection. herein we have reported that various alcohols and phenols have been efficiently converted to the c...

2004
P. J. Worsfold

Chairman: 1989-91 F. Ingman (Sweden); 1991-93 W. E. van der Linden (Netherlands); ViceChairman: 1989-91 R. E. van Grieken (Belgium); Secretary: 1989-91 W. E. van der Linden (Netherlands); Co-Secretary: 1989-91 C. L. Graham (UK); Secretary: 1991-93 C. L. Graham (UK); Titular Members: L. A. Cume (USA; 1989-93); St. Glab (Poland; 1989-93); W. Horwitz (USA; 1989-93); D. L. Massart (Belgium; 1989-93...

الدین هاشمیان, سیدجمال, مرتضوی, سیدباقر, موسوی, سیدغلامرضا, عسگری, قربان ,

Introduction & Objective: In recent years, the use of alternative disinfectants and the control of natural organic matters are two approaches that are typically applied in water treatment utilities to reduce the formation of chlorinated disinfection by-products. Catalytic ozonation is a new technology used to promote the efficiency of ozonation. The goal of this study was to survey the feasib...

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