Indoloquinolizidine alkaloids. A highly stereoselective synthesis of (±)-deplancheine using a dienetricarbonyliron(0) complex
Abstract
An efficient synthesis of (±)-deplancheine (1) is presented. Key steps include a tandem excited-state oxidation–cyclisation of the η4-diene complex (7), and a stereoselective double bond shift [(11)→(12)] induced by Fe2(CO)9