One-Pot Synthesis of 1,3-Disubstituted Allenes from 1-Alkynes, Aldehydes, and Morpholine
作者:Jinqiang Kuang、Shengming Ma
DOI:10.1021/ja910503k
日期:2010.2.17
catalyst for the one-step synthesis of allenesfromterminal alkynes and aldehydes with morpholine as the base in toluene. The reaction is believed to proceed via the intermediacy of propargylic amines, which was converted to allenes by a sequential hydride transfer and beta-elimination process. The reaction is applicable for both aromatic and aliphatic aldehydes. Functionalities such as halide, hydroxyl
Can the Crabbé Homologation Be Successfully Applied to the Synthesis of 1,3-Disubstituted Allenes?
作者:Shinji Kitagaki、Chisato Mukai、Mika Komizu
DOI:10.1055/s-0030-1259936
日期:2011.5
The Crabbe homologation of terminal alkynes could be applied to the synthesis of 1,3-disubstituted allenes using aldehydes, N,N-dicyclohexylamine, and a catalytic amount of copper(I) iodide. The key to this success was the employment of an excess of aldehyde and amine, and performing the reaction under microwave irradiation conditions.