Homo-Diels–Alder cycloadditions catalysed by cobalt–triphenylphosphine-zinc systems
作者:I-Farn Duan、Chien-Hong Cheng、Juan-Su Shaw、Sheng-San Cheng、Kuo Fu Liou
DOI:10.1039/c39910001347
日期:——
[Col2(PPh3)n]âzinc systems (n=1 or 2) exhibit high catalytic activity for the homo-DielsâAlder [2 + 2 + 2] cycloadditions of norbornadiene with various alkynes including terminal and internal acetylenes and methyl prop-2-ynyl ether to give the corresponding deltacyclenes in good to excellent yields.