由(E)-2-芳基-3-(2-(芳基炔烃/烯烃)芳基)丙烯腈支架在以下条件下反应,可实现前所未有的苯并[ a ]芴和萘酰胺取代的苯并[ a ]芴的化学和区域选择性合成。分别通过腈和烯烃的活化实现无金属条件。为腈的这种均官能化提出了一种初步的反应机理。对照实验表明,取决于底物,反应通过选择性腈或烯烃质子化而进行。此外,我们证明了在仅存在TfOH的情况下合成二取代苯并[ a ]芴的另一种快捷途径。
A Facile Route to Polysubstituted Naphthalenes and Benzofluorenols
<i>via</i>
Scandium Triflate‐ and Triflic Acid‐ Catalyzed Benzannulation of 2‐(2‐Alkynylarylidene)‐ 1,3‐Dicarbonyl Compounds
作者:Lu Liu、Lai Wei、Junliang Zhang
DOI:10.1002/adsc.201000286
日期:2010.10.9
This paper describes an efficient scandium triflate- and triflic acid-catalyzed benzannulation of 2-(2-alkynylarylidene)-1,3-dicarbonyl compounds to afford polysubstitutednaphthalenes and benzo[a]fluorenols. The product selectivity could be tuned by subtle choice of the catalyst. An unprecedented process between alkynes and ketones is also explored.
本文介绍了一种高效的scan酸三氟甲磺酸酯和三氟甲基磺酸催化2-(2-炔基亚芳基)-1,3-二羰基化合物的联苯环化反应,以提供多取代的萘和苯并[ a ]芴醇。产物的选择性可以通过催化剂的精细选择来调节。还探索了炔烃和酮之间前所未有的过程。
作者:Ulrich Kloeckner、Peter Finkbeiner、Boris J. Nachtsheim
DOI:10.1021/jo302676g
日期:2013.3.15
An iodocyclization reaction of o-alkynylphenyl carboxaldehydes is reported that is truly catalytic with respect to the electrophilic iodine source. With a combination of tetrabutylammonium iodide (TBAI), Oxone as non-nucleophilic and easy to handle co-oxidant, and fluorinated protic solvents, highly substituted 1-naphthalenones could be prepared in high yields of up to 91%.