Deslongchamps Annulations with Benzoquinone Monoketals
作者:Denis Petrović、Reinhard Brückner
DOI:10.1021/ol202809y
日期:2011.12.16
The so-called Deslongchamps annulation of deprotonated gamma,delta-unsaturated beta-ketoesters 15 to 2-(alkoxycarbonyl)cyclohex-2-en-1-ones or similarly activated cyclohex-2-en-1-ones offers a versatile access to various kinds of decalindiones. The scope of Deslongchamps annulations was extended by establishing acceptor-substituted benzoquinone monoketals such as 13 as viable substrates. They gave octalindiones such as 35 with diastereoselectivities >= 95:5.