Diarylmaleimide derivatives having an indole ring, N-cyanomethyl-2-[2-methoxy-1-benzothiophen-3-yl]-3-[2-methyl-1-octadecylindol-3-yl]maleimide or N-cyanomethyl-2-[2-ethoxy-1-benzothiophen-3-yl]-3-[2-methyl-1-octadecylindol-3-yl]maleimide, were synthesized in an attempt to shift the photosensitive wavelength longer such that it becomes longer than 450 nm. The derivatives underwent the photocyclization reaction upon irradiation with 450–550 nm light in hexane solution and the photogenerated closed-ring isomers returned to the initial open-ring isomers upon irradiation with light longer than 600 nm.
具有
吲哚环的二甲基马来
酰亚胺衍
生物 N-
氰甲基-2-[2-甲氧基-1-
苯并噻吩-3-基]-3-[2-甲基-1-
十八烷基
吲哚-3-基]马来
酰亚胺或 N-
氰甲基-2-[2-乙氧基-1-
苯并噻吩-3-基]-3-[2-甲基-1-
十八烷基
吲哚-3-基]马来
酰亚胺、合成,试图将光敏波长延长至 450 纳米以上。在
正己烷溶液中用 450-550 纳米的光照射这些衍
生物时,它们发生了光环化反应,而在用超过 600 纳米的光照射时,光生成的闭环异构体又回到了最初的开环异构体。