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Dihydropyrazolopyridine and Bis(dihydroindolizine)—Novel Mono‐ and Bifunctional Photochromic Systems
Author(s) -
Dürr Heinz,
Schommer Charles,
Münzmay Thomas
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198605721
Subject(s) - photochromism , bifunctional , photochemistry , chemistry , organic chemistry , catalysis
A reversible 1,5‐electrocyclization is the basis of the photochemistry of the systems 1 and 3 . The corresponding betaines 2 and 4 , which were also precursors in the syntheses of 1 and 3 , respectively, are intense deep red to violet (ECO 2 Me).