Fulgides as Efficient Photochromic Compounds. Role of the Substituent on Furylalkylidene Moiety of Furylfulgides in the Photoreaction
1988; Oxford University Press; Volume: 17; Issue: 6 Linguagem: Inglês
10.1246/cl.1988.1049
ISSN1348-0715
AutoresYasushi Yokoyama, Takakazu Goto, Tetsushi Inoue, Masato Yokoyama, Yukio Kurita,
Tópico(s)Organic Chemistry Cycloaddition Reactions
ResumoAbstract Quantum yields of photoreactions of furylfulgides having Me, Et, n-Pr, or i-Pr on the furylalkylidene moiety were measured. The E–Z isomerization was greatly suppressed and the cyclization was accelerated when the alkyl group (R) became bulkier. When R was i-Pr, no E–Z isomerization was observed and the quantum yield of the colorizing cyclization was 0.62.
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