Effect of co-adsorbed water on photodimerization and photooxygenation of 4-methoxystyrene included in NaY

被引：9

作者：

Matsubara, C

Kojima, M

机构：

[1] Gifu Univ, United Grad Sch Agr Sci, Gifu 5011193, Japan

[2] Shinshu Univ, Fac Agr, Dept Biosci & Biotechnol, Nagano 3908621, Japan

来源：

TETRAHEDRON LETTERS | 1999年 / 40卷 / 17期

关键词：

dimerization; oxygenation; photochemistry; zeolites;

D O I：

10.1016/S0040-4039(99)00510-9

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Irradiation of 4-methoxystyrene (1) in zeolite NaY under vacuum, dry oxygen, and wet air yielded dimers and oxygenation products dependent on the atmosphere and co-adsorbed water. Head-to-head cis- and trans-cyclobutane dimers of 1 were produced at the isomer ratio of 91/9 under vacuum through excimer of 1 and 38/62 under wet air through cation radical of 1, respectively. However, 4-methoxybenzaldehyde was a primary product under dry oxygen at the expense of production of the dimers (c/t = 81/19), These results show significant differences in the photochemical behavior of 1 in solution and in NaY. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.

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页码：3439 / 3442

页数：4

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