Gold‐Catalyzed One‐Pot Synthesis of 1,3‐Disubstituted Allenes from Benzaldehydes and Terminal Alkynes
作者:Danilo M. Lustosa、Simon Clemens、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/adsc.201900824
日期:2019.11.5
A new and facile one‐pot synthesis of 1,3‐disubstituted allenes, using cheap and readily available terminal alkynes, benzaldehyde derivatives and morpholine, was developed. A small library of 20 allenes demonstrates a broad applicability, with yields up to 86%. Isotopic‐labelling and cross‐over experiments strongly indicate that our reaction proceeds via a two‐step A3‐coupling followed by a 1,5‐hydrogen
开发了一种新的且简便的单锅合成1,3-二取代的烯,使用廉价且容易获得的末端炔烃,苯甲醛衍生物和吗啉。一个由20个Allenes组成的小型文库证明了其广泛的适用性,收率高达86%。同位素标记和交叉实验强烈表明,我们的反应是通过两步A 3偶联然后进行1,5氢转移过程进行的。