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

Authors
ALFIMOV MV GROMOV SP STANISLAVSKII OB USHAKOV EN FEDOROVA OA
Citation
Mv. Alfimov et al., CROWN-CONTAINING STYRYL DYES .8. CATION-DEPENDENT CONCERTED [2-AUTOPHOTOCYCLOADDITION OF PHOTOCHROMIC 15-CROWN-5 ETHER BETAINES(2]), Russian chemical bulletin, 42(8), 1993, pp. 1385-1389
Citations number
14
Categorie Soggetti
Chemistry
Journal title
Russian chemical bulletin → ACNP
ISSN journal
10665285
Volume
42
Issue
8
Year of publication
1993
Pages
1385 - 1389
Database
ISI
SICI code
1066-5285(1993)42:8<1385:CSD.CC>2.0.ZU;2-X
Abstract
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-organizati on of the trans-isomers of the styryl dyes upon complexation with the Mg2+ cations into dimers with a fixed mutual arrangement of multiple b onds.