ISSN:
0009-2940
Keywords:
Polyenes, conjugated
;
Bichromophores
;
Steroid (androstane) as spacer
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Synthesis and Optical Properties of Terminally Substituted Conjugated Polyenes with Androstane as SpacerThe conjugated polyenes 10, 11, 21, 22, and 26 with 9-anthryl and 2-tetraphenylporphyrinyl (TPP) terminal groups and an androstane unit incorporated into the polyene chain were synthesized by Wittig or Wittig-type olefinations. In most but not all cases the desired all-(E) isomers could be obtained from the (E)/(Z)-isomeric mixtures by chromatographic purification. From the UV/Vis spectra it is concluded that in all cases the TPP group and the polyene chain are electronically separated, whereas the 9-anthryl residue and the connected dienyl moiety in 10 and 11 are electronically amalgamated. In 21, 22, and 26 a selective excitation of the anthryl group, the TPP moiety, and the polyene is possible.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19931260727
Permalink