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
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%)。
Functionalized heterocyclic scaffolds derived from Morita–Baylis–Hillman Acetates
作者:Huajian Zhu、Nana Shao、Tong Chen、Hongbin Zou
DOI:10.1039/c3cc43285h
日期:——
Five series of heterocycles with extraordinary structural diversity have been regiospecifically synthesized from the same MoritaâBaylisâHillman Acetates (MBHAs). All four potential electrophilic sites (α, β, γ, δ) of MBHAs are proved to be reactive.