Benzylation of toluene and anisole by benzyl alcohol catalysed by niobic acid

被引：27

作者：

Morais, M

Torres, EF

Carmo, LMPM

Pastura, NMR

Gonzalez, WA

dosSantos, ACB

Lachter, ER

机构：

[1] UNIV FED RIO DE JANEIRO,INST QUIM,BR-21949900 RIO JANEIRO,BRAZIL

[2] INST MIL ENGENHARIA,INST QUIM,RIO JANEIRO,BRAZIL

[3] CTR PESQUISA LEOPOLDO MIGUEZ,CENPES,PETROBRAS,RIO JANEIRO,BRAZIL

来源：

CATALYSIS TODAY | 1996年 / 28卷 / 1-2期

关键词：

benzylation; niobic acid; benzyl alcohol; Friedel-Crafts reaction;

D O I：

10.1016/0920-5861(95)00214-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The catalytic activities of commercial niobic acid, niobium pentoxide prepared in laboratory and niobic acid treated with phosphoric acid, were evaluated in the benzylation of toluene and anisole with benzyl alcohol, in liquid phase. The best results were achieved with niobic acid treated with phosphoric acid (pretreatment at 423 K), the conversion of benzyl alcohol was 99.2% with anisole and the main product was the benzylation product. The acidity of these solids has been determined by infrared spectrometry using pyridine as a probe molecule. The ratio of Lewis acidity/Bronsted acidity was higher for niobic acid treated with phosphoric acid.

引用

页码：17 / 21

页数：5

共 16 条

[1]

[Anonymous], FRIEDELCRAFTS CHEM

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