Palladium(0)-catalyzed hydroboration of 1-buten-3-ynes: preparation of allenylboranes
作者:Yonetatsu Matsumoto、Masaki Naito、Tamio Hayashi
DOI:10.1021/om00043a075
日期:1992.7
Reaction of 2-substituted 1-buten-3-ynes (CH2=CR-C=CH) with catecholborane in the presence of a palladium catalyst bearing a monodentate phosphine ligand such as PPh3 or PPh2(C6F5) proceeded in a 1,4-fashion to give (3-substituted 1,2-butadienyl)-1,3,2-benzodioxaboroles (CH3(R)C=C=CH(BO2C6H4)). Reaction of the allenylboranes with benzaldehyde gave the corresponding homopropargyl alcohols.