Rhodium-Catalyzed Cross-Cyclotrimerization and Dimerization of Allenes with Alkynes
作者:Kazuki Sakashita、Yu Shibata、Ken Tanaka
DOI:10.1002/anie.201602155
日期:2016.6.1
It has been established that a cationic rhodium(I)/binap complex catalyzes the cross‐cyclotrimerization of two molecules of a monosubstituted allene with one molecule of a functionalized alkyne to give 3,6‐dialkylidenecyclohex‐1‐enes. In contrast, the reactions involving di‐ or trisubstituted allenes and/or unfunctionalized alkynes afforded cross‐dimerization products, substituted dendralenes, through
现已确定,阳离子铑(I)/联萘酚配合物催化两分子单取代的丙二烯与一分子官能化炔烃的交叉环三聚反应,得到3,6-二亚烷基亚环己基-1-烯。相反,涉及二或三取代的烯基和/或未官能化的炔烃的反应通过从相应的rhodocycles中消除β-氢,提供了交叉二聚化产物,即取代的树枝状烯。