Pyrrole studies. Part 26. A novel thermochromic and photochromic pyrrole system
作者:Judith M. Brittain、R. Alan Jones、Richard O. Jones、Trevor J. King
DOI:10.1039/p19810002656
日期:——
2-a;1′,2′-d]pyrazine (1) when heated with 6% aqueous potassium hydroxide. Upon being heated at 160 °C the colourless dipyrrolopyrazine is converted into a red bis-(1-azafulvene) system, which can be reconverted photochromically into the dipyrrolopyrazine via a [6π+ 6π] cycloaddition reaction.
2-二氯甲基-3,5-双乙氧基羰基-4-甲基吡咯(3)产生热不稳定的5,10-亚甲基二氧基-5 H,10 H-二吡咯并[1,2- a ; 1',2'- d ]吡嗪( 1)与6%的氢氧化钾水溶液一起加热时。在160°C加热后,无色二吡咯并吡嗪转化为红色的双-(1-氮杂富烯)系统,可通过[6π+6π]环加成反应将其光致变色还原为二吡咯并吡嗪。