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Dimethyl 2‐(4‐bromophenyl)‐10,11‐dimethoxy‐2,3,7,8‐tetrahydrospiro[azepino[2,1‐a]isoquinoline‐3,9′‐fluorene]‐4,5‐dicarboxylate |
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| Authors: | Li Feng Zhi‐Ming Li Zhen‐Xia Chen Yong‐Sheng Tan Lin‐Hong Weng Feng‐Gang Tao |
| Abstract: | The title compound, C38H32BrNO6, is a new photochromic tetrahydroazepinoisoquinoline (THAI). The longest spiro bond 1.589 (4) Å] can be broken very easily by UV light, leading to ring opening. This explains the photochromic behaviour. |
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