Ketosulfonyl indoles in the regiodefined synthesis of tryptophols and related indole derivatives
作者:Alessandro Palmieri、Marino Petrini
DOI:10.1039/c2ob25056j
日期:——
Reduction of ketosulfonyl indoles with sodium borohydride provides a ready entry to tryptophols in a regiocomplementary fashion with respect to the traditional oxirane ring-opening by indoles under Friedel–Crafts conditions. Compared to traditional β-ketosulfones, ketosulfonyl indoles show a peculiar behavior since they undergo a Lewis acid promoted elimination of the arylsulfonyl group allowing the