Preparation of push-pull type chromophores via nitrothiophene induced Michael type reaction of alkynes
摘要:
Nitrothiophene activates a neighboring alkyne to undergo Michael addition with dialkylamines and methanol to afford push-pull type chromophores. These compounds exhibit a large positive solvatochromism. The olefinic moiety in (Z)-(((5-nitrothien-2-yl)methylene(ferrocenyl)methyl)diethylamine (14) can be converted to an alpha-diketone. (C) 1999 Elsevier Science Ltd. All rights reserved.