Dimethyl 2-(4-bromophenyl)-10,11-dimethoxy-2,3,7,8-tetrahydrospiro[azepino[2,1-a]isoquinoline-3,9'-fluorene]-4,5-dicarboxylate

Li Feng; Zhi-Ming Li; Zhen-Xia Chen; Yong-Sheng Tan; Lin-Hong Weng; Feng-Gang Tao

doi:10.1107/S0108270104015860

Dimethyl 2-(4-bromophenyl)-10,11-dimethoxy-2,3,7,8-tetrahydrospiro[azepino[2,1-a]isoquinoline-3,9'-fluorene]-4,5-dicarboxylate

Acta Crystallogr C. 2004 Sep;60(Pt 9):o680-1. doi: 10.1107/S0108270104015860. Epub 2004 Aug 21.

Authors

Li Feng¹, Zhi-Ming Li, Zhen-Xia Chen, Yong-Sheng Tan, Lin-Hong Weng, Feng-Gang Tao

Affiliation

¹ Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China.

PMID: 15345855
DOI: 10.1107/S0108270104015860

Abstract

The title compound, C38H32BrNO6, is a new photochromic tetrahydroazepinoisoquinoline (THAI). The longest spiro bond [1.589 (4) A] can be broken very easily by UV light, leading to ring opening. This explains the photochromic behaviour.