Tungstophosphoric acid (H3PW12O40) as a heterogeneous inorganic catalyst.: Activation of hexamethyldisilazane (HMDS) by tungstophosphoric acid for efficient and selective solvent-free O-silylation reactions

被引:119
作者
Firouzabadi, H [1 ]
Iranpoor, N [1 ]
Amani, K [1 ]
Nowrouzi, F [1 ]
机构
[1] Shiraz Univ, Dept Chem, Shiraz 71454, Iran
来源
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1 | 2002年 / 23期
关键词
D O I
10.1039/b208202k
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Tungstophosphoric acid (H3PW12O40) effectively activates hexamethyldisilazane for the selective silylation of primary, secondary, tertiary and phenolic hydroxy groups under solvent-free conditions at 55-60 degreesC.
引用
收藏
页码:2601 / 2604
页数:4
相关论文
共 39 条
[1]   CATALYSTS FOR SILYLATIONS WITH 1,1,1,3,3,3-HEXAMETHYLDISILAZANE [J].
BRUYNES, CA ;
JURRIENS, TK .
JOURNAL OF ORGANIC CHEMISTRY, 1982, 47 (20) :3966-3969
[2]   Heterogeneous catalysis in trimethylsilylation of alcohols and phenols by zirconium sulfophenyl phosphonate [J].
Curini, M ;
Epifano, F ;
Marcotullio, MC ;
Rosati, O ;
Costantino, U .
SYNTHETIC COMMUNICATIONS, 1999, 29 (03) :541-546
[3]   An acidity scale for Bronsted acids including H3PW12O40 [J].
Drago, RS ;
Dias, JA ;
Maier, TO .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (33) :7702-7710
[4]   Organic reactions without solvent [J].
Epple, M .
CHEMIE INGENIEUR TECHNIK, 1999, 71 (1-2) :35-42
[5]   A high yielding preparation of α-trimethylsilyloxyphosphonates by silylation of α-hydroxyphosphonates with HMDS catalyzed by iodine [J].
Firouzabadi, H ;
Iranpoor, N ;
Sobhani, S .
TETRAHEDRON LETTERS, 2002, 43 (20) :3653-3655
[6]   Tungstophosphoric acid catalyzed oxidation of aromatic amines to nitro compounds with sodium perborate in micellar media [J].
Firouzabadi, H ;
Iranpoor, N ;
Amani, K .
GREEN CHEMISTRY, 2001, 3 (03) :131-132
[7]   ZINC-CHLORIDE CATALYZED SILYLATION OF ALCOHOLS AND PHENOLS BY HEXAMETHYLDISILAZANE - A HIGHLY CHEMOSELECTIVE REACTION [J].
FIROUZABADI, H ;
KARIMI, B .
SYNTHETIC COMMUNICATIONS, 1993, 23 (12) :1633-1641
[8]   Nitrogen ligand complexes of metal chlorides as effective catalysts for the highly regio- and chemoselective silylation of hydroxyl groups with hexamethyldisilazane (HMDS) at room temperature [J].
Firouzabadi, H ;
Sardarian, AR ;
Khayat, Z ;
Karimi, B ;
Tangestaninejad, S .
SYNTHETIC COMMUNICATIONS, 1997, 27 (15) :2709-2719
[9]  
FIROUZABADI H, 2002, IN PRESS SYNTHESIS
[10]  
FIROUZABADI H, 2002, IN PRESS J MOL CATAL