Stereoselective [2+2] photocycloaddition in bispseudosandwich complexes of bis(18-crown-6) stilbene with alkanediammonium ions
作者:S. P. Gromov、A. I. Vedernikov、L. G. Kuz’mina、N. A. Lobova、S. S. Basok、Yu. A. Strelenko、M. V. Alfimov
DOI:10.1007/s11172-009-0016-4
日期:2009.1
1, 1 : 2, and 2 : 2 complexes with H3N+(CH2)nNH3+ 2ClO4− salts (n = 2—10, 12). The length of the polymethylene chain in the diammonium ions affects the phototransformation direction of stilbene and the composition of the products. In the 2: 2 bispseudosandwich complexes with relatively short alkanediammonium ions (n = 2—4), the stereoselective reaction of [2+2] photocycloaddition proceeds to form mainly