CROWN-CONTAINING STYRYL DYES .8. CATION-DEPENDENT CONCERTED [2+2]-AUTOPHOTOCYCLOADDITION OF PHOTOCHROMIC 15-CROWN-5 ETHER BETAINES

被引：37
|
作者：
ALFIMOV, MV
GROMOV, SP
STANISLAVSKII, OB
USHAKOV, EN
FEDOROVA, OA
机构：
[1] N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 117913
来源：
RUSSIAN CHEMICAL BULLETIN | 1993年 / 42卷 / 08期
关键词：
CROWN-CONTAINING STYRYL DYES; COMPLEXES WITH MG2+; PHOTOCYCLODIMERIZATION; CYCLOBUTANE DERIVATIVES; H-1 AND C-13 NMR SPECTRA;
D O I：
10.1007/BF00699938
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Styryl dyes containing a crown ether group and a heteroaromatic moiety with a sulfoalkyl N-substituent (1a,b) undergo photocyclodimerization in acetonitrile in the presence of Mg(ClO4)2 to give only the type A isomer of cyclobutane derivative (2a,b). The photochemical regio- and stereoselectivity of the cycloaddition is explained by self-organization of the trans-isomers of the styryl dyes upon complexation with the Mg2+ cations into dimers with a fixed mutual arrangement of multiple bonds.
引用
收藏
页码：1385 / 1389
页数：5
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