ISSN:
1573-9171
Keywords:
crown-containing styryl dyes
;
complexes with Mg2+
;
photocyclodimerization
;
cyclobutane derivatives
;
1H and13C NMR spectra
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Styryl dyes containing a crown ether group and a heteroaromatic moiety with a sulfoalkylN-substituent (1a,b) undergo photocyclodimerization in acetonitrile in the presence of Mg(ClO4)2 to give only the typeA isomer of cyclobutane derivative (2a,b). The photochemical regio- and stereoselectivity of the cycloaddition is explained by self-organization of thetrans-isomers of the styryl dyes upon complexation with the Mg2+ cations into dimers with a fixed mutual arrangement of multiple bonds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00699938
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