Scandium triflate-catalyzed cyclocondensation of 1,3-dialkoxybenzenes with 1,3,5-trioxane. Formation of resorcin[4]arenes and confused resorcin[4]arenes

被引:8
|
作者
Morikawa, Osamu [1 ]
Nagamatsu, Yoshihisa [1 ]
Nishimura, Akihiko [1 ]
Kobayashi, Kazuhiro [1 ]
Konishi, Hisatoshi [1 ]
机构
[1] Tottori Univ, Fac Engn, Dept Mat Sci, Tottori 6808552, Japan
关键词
resorcinarene; metacyclophane; crystal structure;
D O I
10.1016/j.tetlet.2006.04.015
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The cyclocondensation of 1,3-dialkoxybenzenes with 1,3,5-trioxane was catalyzed by Sc(OTf)(3) to produce resorcin[4]arene octaalkyl ethers as the major products. In addition, 'confused' resorcin[4]arene octaalkyl ethers bearing one alkoxy group at the intra-annular position were obtained as the minor products. The variable temperature H-1 NMR spectroscopy showed that the alkoxy group at the intra-annular position cannot pass through the macrocyclic annulus, indicating a rigid molecular framework. The structure of the ethoxy derivative of the confused resorcin[4]arene was determined by X-ray crystallography. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3991 / 3994
页数:4
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