Thiophene derivative having long conjugated chain at 3-position,

Details Thiophene derivative having long conjugated chain at 3-position, Thiophene derivative having long conjugated chain at 3-position,

1991-06-27

1993-09-21

Russell, Mark

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 78, 549 79, C07D40906, C07D33338

Patent

active

052470989

ABSTRACT:
Thiophene derivatives represented by the general formula (I): ##STR1## where R is an aldehyde, carboxyl, C.sub.1-5 -alkyl ester or C.sub.1-5 -alkyl acetal group and n is 3 to 5, are prepared. These compounds are reversibly converted to their respective isomers by light irradiation, accompanied with a large shift of absorption and emission bands, thus suitable for a photo-responsive material.

REFERENCES:
patent: 4766198 (1988-08-01), Harper et al.
Norval et al., Photochemistry and Photobiology, vol. 49, No. 5, pp. 633-639, "Urocanic Acid Analogs . . . " (1989).
Trippett et al., "The Use, in Wittig Reactions . . . A Basic Group" J. Chem. Soc., vol. 1266, pp. 2130-2133 (1961).
Archer et al., "Electrophilic Aromatic Substitution . . . benzene" J. Chem. Soc., Perkin Trans. II, pp. 813-819 (1983) [Paper 2/1335].
Norval et al., Chemical Abstracts, 111:53351g, p. 357, abstract of Photochem. Photobiol. Bacterial., 49(5), 633-9, 1989 (1989).

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