English  |  正體中文  |  简体中文  |  Items with full text/Total items : 6498/11670
Visitors : 25648799      Online Users : 325
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16840

Title: Methoxymethylation of Alcohols Catalyzed by Sulfated Metal Oxides
Authors: Lin, Chiu-Hsun;Wan, Min-Yi;Huang, Yu-Min
Contributors: 化學系
Keywords: Methoxymethylation of alcohols;Sulfated metal oxides;Steric effect
Date: 2003-04
Issue Date: 2013-06-05T09:36:30Z
Publisher: SpringerLink
Abstract: More acidic sulfated metal oxides (SMO) such as SO4 2-/ZrO2 and SO4 2-/TiO2 catalyzed the methoxymethylation of alcohols with dimethoxymethane at ambient temperature to achieve a product yield of greater than 90% within a few hours. The reaction displayed a significant steric effect on the product yield with a preferential order of primary alcohol > secondary alcohol tertiary alcohol. The observed steric effect might result from the repulsion between the bulky alkyl group in the alcohol and the two methoxy groups in the protonated dimethoxymethane (oxonium ion).
Relation: Catalysis letters, 87(3-4): 253-256
Appears in Collections:[化學系] 期刊論文

Files in This Item:

File SizeFormat

All items in NCUEIR are protected by copyright, with all rights reserved.


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback