La(OTf)<sub>3</sub>-catalysed one-pot synthesis of pyrazole tethered imidazo[1,2-<i>a</i>]azine derivatives and evaluation of their light emitting properties
作者:Shubham Sharma、Avijit Kumar Paul、Virender Singh
DOI:10.1039/c9nj05426j
日期:——
A facile and efficient protocol has been unfolded towards the diversity-oriented synthesis of highly fluorescent pyrazole C-3(5) tethered imidazo[1,2-a]azines via an La(OTf)3 catalysed one-pot multicomponent assembly of pyrazole carbaldehydes, 2-aminoazines and isonitriles. This present protocol offers several advantages such as multiple bond formation in a single step, low catalyst loading, short
通过La(OTf)3催化的吡唑甲醛单组分多组分组装,已实现了简便高效的方案,用于多样性导向的高荧光吡唑C-3(5)束缚的咪唑并[1,2- a ]嗪的合成。,2-氨基嗪和异腈。本方案具有几个优点,例如在一个步骤中形成多个键,催化剂用量低,反应时间短,可观的原子经济性,良好的官能团耐受性,可扩展性和易于执行的反应条件。吡唑基咪唑并[1,2的光学性质一个]吖嗪进行了研究,并且它们表现出优异的荧光量子产率(Φ ˚F高达83%)。