(3 + 2)-Annulation of donor-acceptor cyclopropanes to alkynes induced by both Lewis and Bronsted acids has been developed. The reaction provides a rapid approach to functionalized indenes displaying intense visible emission (lambda(max) = 430 nm, Phi = 0.28-0.34).
供体-受体
环丙烷与
炔烃之间的(3 + 2)环化反应在
路易斯酸和布朗斯特酸的共同诱导下实现。该反应提供了一种快速制备功能化
吲哚满的方法,这些
吲哚满显示出强烈的可见光发射特性(λmax= 430 nm,Φ= 0.28-0.34)。